STEARIC ACID (STEARK AST)

CAS No. : 57-11-4

EC No. : 200-313-4

Synonyms:

stearic acid; Octadecanoic acid; stereate; stearate; 57-11-4; STEARK AST; STEARIC ACID; Stearophanic acid; Cetylacetic acid; n-Octadecanoic acid; Pearl stearic; Stearex Beads; Octadecansaeure; Stearinsaeure; Vanicol; 1-Heptadecanecarboxylic acid; Century 1240; Industrene R; Glycon DP; Glycon TP; Humko Industrene R; Formula 300; Hydrofol 1895; Hystrene 9718; Hydrofol Acid 150; Glycon S-80; Glycon S-90; Hydrofol acid 1655; Hydrofol acid 1855; Tegostearic 254; Tegostearic 255; Tegostearic 272; Hystrene 80; octadecoic acid; Industrene 5016; Hystrene S-97; Hystrene T-70; Dar-chem 14; Emersol 120; Emersol 132; Hystrene 4516; Hystrene 5016; Hystrene 7018; Groco 54; Groco 55; Groco 55L; Groco 58; Groco 59; Glycon S-70; Industrene 8718; Industrene 9018; Stearate; Kam 1000; Emersol 150; Steric acid; Neo-Fat 18-53; Neo-Fat 18-54; Neo-Fat 18-59; Neo-Fat 18; Acidum stearinicul; Caswell No. 801D; HY-Phi 1199; HY-Phi 1205; HY-Phi 1303; HY-Phi 1401; stearik asit; stearik; asit; acide; stearic; steric acid; sterik asit; stearic acid; Neo-Fat 18-S; Kam 2000; Kam 3000; Oktadekansaeure; Neo-Fat 18-55; Neo-Fat 18-61; acide stearique; FEMA No. 3035; PD 185; C18:0; acide octadecanoique; Stearic acid, pure; NAA 173; Hydrofol Acid 150 (VAN); CCRIS 2305; Prifac 2918; Lunac; HSDB 2000; Vis-Plus; Barolub FTA; UNII-4ELV7Z65AP; MFCD00002752; NSC 25956; Haimaric MKH(R); Isostearic acid EX; Prodhygine; EPA Pesticide Chemical Code 079082; Stearic Acid Cherry; Edenor C18; Emersol 153NF; Emersol 871; Emersol 875; Prisorine 3501; Prisorine 3502; Prisorine 3508; Stearic acid (TN); CH3-[CH2]16-COOH; Flexichem B; Loxiol G 20; Century 1210; Century 1220; Century 1230; Emersol 6349; AI3-00909; Emery 875D; Lunac S 20; Lunac S 40; WO 2 (fatty acid); Emery 871; Hydrofol Acid 1895; Unimac 5680; C-Lube 10; Bonderlube 235; EINECS 200-313-4BRN 0608585; 4ELV7Z65AP; Adeka Fatty Acid SA 910; CHEMBL46403; CHEBI:28842; QIQXTHQIDYTFRH-UHFFFAOYSA-N; NSC25956; STEARIC ACID (Stearik Asit); Dermarone; EINECS 250-178-0; Stearic acid, 97%; NCGC00091596-02; 875D; DSSTox_CID_1642; DSSTox_RID_76256; DSSTox_GSID_21642; Stearic Acid (Powder/Beads/Flakes); Fatty acids, C16-20; (1-14c)octadecanoic acid; CAS-57-11-4; STE; NSC 261168; Stearic acid [JAN:NF]; Stearic acid [USAN:JAN]; Industrene; Stearophanate; Hystrene; Promulsin; Stearex; Tsubaki; n-Octadecanoate; stearic-acid; 1hmr; 1hmt; 4fnn; Kiri stearic acid; Edenor FHTI; Lunac YA; n-Octadecylic acid; Stearic acid, CP; EINECS 273-087-8; F 3 (lubricant); Industrene 4518; Nonsoul SK 1; Pristerene 4900; Pristerene 4904; Pristerene 4963; Pristerene 9429; Pristerene 9559; Hystrene S 97; Hystrene T 70; N-octadecanoic acidd; Edenor ST 1; Sunfat 18S; Emersol 153, Selosol 920; Industrene 5016K; Stearic Acid 110; Stearic Acid 120; Stearic Acid 420; Hystrene 9718NF; Kortacid 1895; Radiacid 0427; Edenor ST 20; Lunac 30; Serfax MT 90; Stearic acid_ravikumar; Unister NAA 180; Century 1224; Edenor HT-JG 60; Lunac S 90KC; Stearic acid (8CI); Stearic acid, puriss; Hystrene 7018 FG; Hystrene 9718NFFG; Lunac S 30; Lunac S 50; Lunac S 90; 3v2p; 1-Heptadecanecarboxylate; Industrene 7018 FG; Stearic Acid NF Powder; stearic acid; Octadecanoic acid; stereate; stearate; 57-11-4; STEARK AST; STEARIC ACID; Stearophanic acid; Cetylacetic acid; n-Octadecanoic acid; Pearl stearic; Stearex Beads; Octadecansaeure; Stearinsaeure; Vanicol; 1-Heptadecanecarboxylic acid; Century 1240; Industrene R; Glycon DP; Glycon TP; Humko Industrene R; Formula 300; Hydrofol 1895; Hystrene 9718; Hydrofol Acid 150; Glycon S-80; Glycon S-90; Hydrofol acid 1655; Hydrofol acid 1855; Tegostearic 254; Tegostearic 255; AFCO-Chem B 65; STEARIC ACID (Stearik Asit); Stearic Acid – 65%; Stearic Acid – 70%; Stearic Acid 153 NF; Heptadecanecarboxylic acid; Stearic Acid & Glycerin; Edenor C 18/98; S 300 (fatty acid); Octadecanoic acid (9CI); Stearic acid, >=98%; ACMC-1AR8K; SCHEMBL659; Hystrene 9718 NF FG; SA 400 (fatty acid); bmse000485; Stearic Acid, High Purity; C18:0 (Lipid numbers); EC 200-313-4; Emery 400 (Salt/Mix); Stearic acid min. 98 %; AC1Q2W3T; Stearic acid (JP15/NF); Stearic acid (JP17/NF); Stearic Acid Triple-Pressed; Triple Pressed Stearic Acid; Emersol 110 (Salt/Mix); Stearic Acid – High Purity; 4-02-00-01206 (Beilstein Handbook Reference); 68937-76-8; KSC269I2T; WLN: QV17; Agar Agar Type K-100 NF; Stearic Acid – Triple Pressed; STEARIC ACID, U.S.P.; 17FA; AC1L1K05; AC1Q2W39; GTPL3377; WO 2; Stearic Acid (Fragrance Grade); Stearic Acid High Purity 90%; Nonsoul SN 1 (*Sodium salt*); S 30C S 30C (fatty acid); SNA-2000 (*Sodium salt*); Stearic acid, analytical standard; VLZ 200; Stearic Acid High Purity 90% V; Stearic Acid Flake 132 NF Flake; Stearic acid, reagent grade, 95%; HY-B2219; Stearic Acid 400 (Rubber Grade); ZINC4978673; Tox21_111154; Tox21_201887; Tox21_300562; ANW-13575; BBL012224; BDBM50240485; LMFA01010018; NSC-25956; SA 200; SBB060276; Stearic acid, >=95%, FCC, FG; STL163565; AKOS005716958; Tox21_111154_1; DB03193; FA 1655; LS-1388; MCULE-5127577640; NE10227; RL04156; RTR-021907; T16-55F; NCGC00091596-01; NCGC00091596-03; NCGC00091596-04; NCGC00091596-05; NCGC00254456-01; NCGC00259436-01; AN-23575; BC207369; E570; I727; LS-85169; SC-81164; ST023799; AB1002380; ST2419874; Stearic acid, puriss., >=98.5% (GC); Stearic acid, SAJ first grade, >=90.0%; TR-021907; CS-0021598; FT-0689088; G 270; S 300; S0163; Stearic acid, SAJ special grade, >=95.0%; Stearic acid, Vetec(TM) reagent grade, 94%; 400JB9103-88; A 1760; C01530; Stearic acid 50, tested according to Ph.Eur.; Vegetable Stearic Acid 7036 FG, Kosher, NF; SR-01000944717; Melting Point Standard 69-71C, analytical standard; SR-01000944717-1; Stearic acid, Grade I, >=98.5% (capillary GC); Stearic acid, SAJ first grade, >=90.0%, powder; I04-10522; F0001-1489; Stearic acid, certified reference material, TraceCERT(R); CD7993EA-AD14-452A-A907-33376CC98790; Stearic acid, European Pharmacopoeia (EP) Reference Standard; UNII-79P21R4317 component QIQXTHQIDYTFRH-UHFFFAOYSA-N; Stearic acid, United States Pharmacopeia (USP) Reference Standard; Stearic Acid, Pharmaceutical Secondary Standard; Certified Reference Material; Stearic acid 50; Acidum stearicum 50; Fatty acids C16-18; Fattyacids, C16-18; palmitic acid; stearic acid; SCHEMBL373940; Palmitic acid stearic acid mixture; Stearic acid – palmitic acid mixture; Stearic acid diethanolamine salt; 2717-16-0; Diethanolamine stearate; STEARIC ACID (Stearik Asit); Stearic acid, diethanolamine salt; Stearic acid, compd. with 2,2′-iminodiethanol; EINECS 220-312-2; Stearic acid, compound with 2,2′-iminodiethanol (1:1); SCHEMBL35955; DTXSID3062603; CTK4F9204; Octadecanoic acid, compd. with 2,2′-iminobis(ethanol) (1:1); 12-(9-anthroyloxy)stearic acid; 30536-60-8; 9-Anthracenecarboxylic acid, 11-carboxy-1-hexylundecyl ester; 12-((Anthracene-9-carbonyl)oxy)octadecanoic acid; 12-[(Anthracene-9-carbonyl)oxy]octadecanoic acid; 12-AS Cpd; SCHEMBL593057; CTK4G5381; DTXSID80952836; FT-0697039; (+-)-12-(9-ANTHROYLOXY)STEARIC ACID; Q27247549; 9-Anthracenecarboxylicacid, 11-carboxy-1-hexylundecyl ester; stearic acid; Octadecanoic acid; stereate; stearate; 57-11-4; STEARK AST; STEARIC ACID; Stearophanic acid; Cetylacetic acid; n-Octadecanoic acid; Pearl stearic; Stearex Beads; Octadecansaeure; Stearinsaeure; Vanicol; 1-Heptadecanecarboxylic acid; Century 1240; Industrene R; Glycon DP; Glycon TP; Humko Industrene R; Formula 300; Hydrofol 1895; Hystrene 9718; Hydrofol Acid 150; Glycon S-80; Glycon S-90; Hydrofol acid 1655; Hydrofol acid 1855; Tegostearic 254; Tegostearic 255; Tegostearic 272; Hystrene 80; octadecoic acid; Industrene 5016; Hystrene S-97; Hystrene T-70; Dar-chem 14; Emersol 120; Emersol 132; Hystrene 4516; Hystrene 5016; Hystrene 7018; Groco 54; Groco 55; Groco 55L; Groco 58; Groco 59; Glycon S-70; Industrene 8718; Industrene 9018; Stearate; Kam 1000; Emersol 150; Steric acid; Neo-Fat 18-53; Neo-Fat 18-54; Neo-Fat 18-59; Neo-Fat 18; Acidum stearinicul; Caswell No. 801D; HY-Phi 1199; HY-Phi 1205; HY-Phi 1303; HY-Phi 1401; stearik asit; stearik; asit; acide; stearic; steric acid; sterik asit; stearic acid; Neo-Fat 18-S; Kam 2000; Kam 3000; Oktadekansaeure; Neo-Fat 18-55; Neo-Fat 18-61; acide stearique; FEMA No. 3035; PD 185; C18:0; acide octadecanoique; Stearic acid, pure; NAA 173; Hydrofol Acid 150 (VAN); CCRIS 2305; Prifac 2918; Lunac; HSDB 2000; Vis-Plus; Barolub FTA; UNII-4ELV7Z65AP; MFCD00002752; NSC 25956; Haimaric MKH(R); Isostearic acid EX; Prodhygine; EPA Pesticide Chemical Code 079082; Stearic Acid Cherry; Edenor C18; Emersol 153NF; Emersol 871; Emersol 875; Prisorine 3501; Prisorine 3502; Prisorine 3508; Stearic acid (TN); CH3-[CH2]16-COOH; Flexichem B; Loxiol G 20; Century 1210; Century 1220; Century 1230; Emersol 6349; AI3-00909; Emery 875D; Lunac S 20; Lunac S 40; WO 2 (fatty acid); Emery 871; Hydrofol Acid 1895; Unimac 5680; C-Lube 10; Bonderlube 235; EINECS 200-313-4BRN 0608585; 4ELV7Z65AP; Adeka Fatty Acid SA 910; CHEMBL46403; CHEBI:28842; QIQXTHQIDYTFRH-UHFFFAOYSA-N; NSC25956; STEARIC ACID (Stearik Asit); Dermarone; EINECS 250-178-0; Stearic acid, 97%; NCGC00091596-02; 875D; DSSTox_CID_1642; DSSTox_RID_76256; DSSTox_GSID_21642; Stearic Acid (Powder/Beads/Flakes); Fatty acids, C16-20; (1-14c)octadecanoic acid; CAS-57-11-4; STE; NSC 261168; Stearic acid [JAN:NF]; Stearic acid [USAN:JAN]; Industrene; Stearophanate; Hystrene; Promulsin; Stearex; Tsubaki; n-Octadecanoate; stearic-acid; 1hmr; 1hmt; 4fnn; Kiri stearic acid; Edenor FHTI; Lunac YA; n-Octadecylic acid; Stearic acid, CP; EINECS 273-087-8; F 3 (lubricant); Industrene 4518; Nonsoul SK 1; Pristerene 4900; Pristerene 4904; Pristerene 4963; Pristerene 9429; Pristerene 9559; Hystrene S 97; Hystrene T 70; N-octadecanoic acidd; Edenor ST 1; Sunfat 18S; Emersol 153, Selosol 920; Industrene 5016K; Stearic Acid 110; Stearic Acid 120; Stearic Acid 420; Hystrene 9718NF; Kortacid 1895; Radiacid 0427; Edenor ST 20; Lunac 30; Serfax MT 90; Stearic acid_ravikumar; Unister NAA 180; Century 1224; Edenor HT-JG 60; Lunac S 90KC; Stearic acid (8CI); Stearic acid, puriss; Hystrene 7018 FG; Hystrene 9718NFFG; Lunac S 30; Lunac S 50; Lunac S 90; 3v2p; 1-Heptadecanecarboxylate; Industrene 7018 FG; Stearic Acid NF Powder; AFCO-Chem B 65; STEARIC ACID (Stearik Asit); Stearic Acid – 65%; Stearic Acid – 70%; Stearic Acid 153 NF; Heptadecanecarboxylic acid; Stearic Acid & Glycerin; Edenor C 18/98; S 300 (fatty acid); Octadecanoic acid (9CI); Stearic acid, >=98%; ACMC-1AR8K; SCHEMBL659; Hystrene 9718 NF FG; SA 400 (fatty acid); bmse000485; Stearic Acid, High Purity; C18:0 (Lipid numbers); EC 200-313-4; Emery 400 (Salt/Mix); Stearic acid min. 98 %; AC1Q2W3T; Stearic acid (JP15/NF); Stearic acid (JP17/NF); Stearic Acid Triple-Pressed; Triple Pressed Stearic Acid; Emersol 110 (Salt/Mix); Stearic Acid – High Purity; 4-02-00-01206 (Beilstein Handbook Reference); 68937-76-8; KSC269I2T; WLN: QV17; Agar Agar Type K-100 NF; Stearic Acid – Triple Pressed; STEARIC ACID; stearic acid; Octadecanoic acid; stereate; stearate; 57-11-4; STEARK AST; STEARIC ACID; Stearophanic acid; Cetylacetic acid; n-Octadecanoic acid; Pearl stearic; Stearex Beads; Octadecansaeure; Stearinsaeure; Vanicol; 1-Heptadecanecarboxylic acid; Century 1240; Industrene R; Glycon DP; Glycon TP; Humko Industrene R; Formula 300; Hydrofol 1895; Hystrene 9718; Hydrofol Acid 150; Glycon S-80; Glycon S-90; Hydrofol acid 1655; Hydrofol acid 1855; Tegostearic 254; Tegostearic 255

Stearic acid (stearik asit)

Stearic acid (STEARIC ACID, stearik asit) is a saturated long-chain fatty acid with an 18-carbon backbone. Stearic acid (STEARIC ACID, stearik asit) is found in various animal and plant fats, and is a major component of cocoa butter and shea butter.Octadecanoic acid is a C18 straight-chain saturated fatty acid component of many animal and vegetable lipids. As well as in the diet, it is used in hardening soaps, softening plastics and in making cosmetics, candles and plastics. It has a role as a plant metabolite, a human metabolite, a Daphnia magna metabolite and an algal metabolite. It is a long-chain fatty acid, a straight-chain saturated fatty acid and a saturated fatty acid. It is a conjugate acid of an octadecanoate. It derives from a hydride of an octadecane.Stearic acid (STEARIC ACID, stearik asit) is a white solid with a mild odor. Floats on water.Alternative Titles: n-octadecanoic acid, octadecanoic acid

Stearic acid (STEARIC ACID, stearik asit), also called Octadecanoic Acid, one of the most common long-chain fatty acids, found in combined form in natural animal and vegetable fats. Commercial “Stearic acid (STEARIC ACID, stearik asit)” is a mixture of approximately equal amounts of stearic and palmitic acids and small amounts of oleic acid. It is employed in the manufacture of candles, cosmetics, shaving soaps, lubricants, and pharmaceuticals.

Structural formula of Stearic acid (STEARIC ACID, stearik asit).

Encyclopædia Britannica, Inc.

In nature Stearic acid (STEARIC ACID, stearik asit) occurs primarily as a mixed triglyceride, or fat, with other long-chain acids and as an ester of a fatty alcohol. It is much more abundant in animal fat than in vegetable fat; lard and tallow often contain up to 30 percent Stearic acid (STEARIC ACID, stearik asit).

Alkaline hydrolysis, or saponification, of fats yields soaps, which are the sodium or potassium salts of fatty acids; pure Stearic acid (STEARIC ACID, stearik asit) is obtained with difficulty from such a mixture by crystallization, vacuum distillation, or chromatography of the acids or suitable derivatives. The pure acid undergoes chemical reactions typical of carboxylic acids. It is a colourless, waxy solid that is almost insoluble in water.Stearic acid (STEARIC ACID, stearik asit) is a very common amino acid is used in the manufacturing of more than 3,200 skin and hair care products sold in the United States. On product labels, it is sometimes listed under other names, including Century 1240, cetylacetic acid, Emersol 120, Emersol 132, Emersol 150, Formula 300 and Glycon DP.

For Black Friday, you can get 25% off many professional skincare brands when you enter the code CYBER at the checkout, handy if you are searching for products which contain Stearic acid (STEARIC ACID, stearik asit).

Where is Stearic acid (STEARIC ACID, stearik asit) found?

In nature, Stearic acid (STEARIC ACID, stearik asit) is found in the fats and oils of plants and animals. Animal fat samples typically consist of 30% Stearic acid (STEARIC ACID, stearik asit). Most plant oils receive 5% of their volume from the amino acid, with the exception of cocoa butter and shea butter, which contain as much as nine times more Stearic acid (STEARIC ACID, stearik asit).How is Stearic acid (STEARIC ACID, stearik asit) produced?

To isolate the substance, fat or oil that contains the amino acid is heated and pressurized. Then, the material is placed in boiling water inside a distillation machine. This device catches the steam given off by boiling the fat or oil samples and then carries it through a series of chilled coils. The sudden drop in temperature causes the Stearic acid (STEARIC ACID, stearik asit) to condense and become a liquid. It can then be further cooled to produce a waxy solid substance.What is Stearic acid (STEARIC ACID, stearik asit) used in?

One of the largest uses of Stearic acid (STEARIC ACID, stearik asit) is in the production of soaps. When added to these products, the amino acid helps to thicken and harden the other ingredients to form a solid bar. Stearic acid (STEARIC ACID, stearik asit) also has important cleansing properties that make it useful in soaps. The ingredient acts as a surfactant, a substance that lowers the surface tension of oils. Oils have a higher surface tension than ordinary water, which is why water droplets do not readily mix with oils. By lowering the surface tension of oil, Stearic acid (STEARIC ACID, stearik asit) allows water to combine with the oil molecules and wash them away. As a result, Stearic acid (STEARIC ACID, stearik asit) helps to remove dirt, sweat and excess sebum from the skin and hair. This makes it a useful ingredient in cleansers, body washes and shampoos as well as bar soaps.Why is Stearic acid (STEARIC ACID, stearik asit) in so many products?

Because Stearic acid (STEARIC ACID, stearik asit) helps water and oil mix, the ingredient is also added to many liquid cosmetics and skin and hair care products in low concentrations to function as an additive rather than an active ingredient or cleansing agent. In these products, Stearic acid (STEARIC ACID, stearik asit) helps prevent the formulas from separating into liquid and oily layers. As a result, products that contain Stearic acid (STEARIC ACID, stearik asit) require less shaking prior to use and remain more potent when stored for extended periods of time.Is it Stearic acid (STEARIC ACID, stearik asit) natural?

Because Stearic acid (STEARIC ACID, stearik asit) is derived from natural sources and not produced in industrial settings, it is sometimes used as an alternative to chemical ingredients in natural skin care. Often the ingredient is sourced from by-products obtained during the processing of meats, particularly pork. For this reason, it is not frequently used in vegan cosmetics and skin care however; Stearic acid (STEARIC ACID, stearik asit) sourced from plants is suitable in formulas that are animal-free.Can I use Stearic acid (STEARIC ACID, stearik asit)?

The US Food and Drug Administration has concluded that Stearic acid (STEARIC ACID, stearik asit) is safe for topical use in skin care products in limited quantities, indicating that some people with sensitive skin may be unable to tolerate the ingredient. Introduction to Stearic acid (STEARIC ACID, stearik asit)

Stearic acid (STEARIC ACID, stearik asit), another name for octadecanoic acid CH3(CH2)16COOH, is one of the most common fatty acids. It exists as a glycerol ester in most animal and plant fats (Beare-Rogers, Dieffenbacher, & Holm, 2001). Stearic acid (STEARIC ACID, stearik asit) is more abundant in animal fat (up to 30%) than vegetable fat (typically <5%). The important exceptions are cocoa butter and shea butter, in which the Stearic acid (STEARIC ACID, stearik asit) content (as a triglyceride) is 28-45%. Unlike the other long-chain saturated fatty acids, Stearic acid (STEARIC ACID, stearik asit) has no effect on lipoprotein cholesterol concentrations in men or women (Yu, Derr, Etherton, & Kris-Etherton, 1995). Results from the study by Kelly et al. (2001) indicate that Stearic acid (STEARIC ACID, stearik asit) (19 g/day) in the diet has favorable effects on thrombogenic and atherogenic risk factors in males; the authors recommend that the food industry consider enriching foods with Stearic acid (STEARIC ACID, stearik asit) instead of palmitic acid and trans fatty acids. Thus, Stearic acid (STEARIC ACID, stearik asit) is nontoxic and biocompatible with the human body. With a polar head group that can bind with metal cations and a nonpolar chain that confers solubility in organic solvents, Stearic acid (STEARIC ACID, stearik asit) is commonly used in the production of detergents, soaps, and cosmetics, such as shampoos and shaving cream products.Stearic acid (STEARIC ACID, stearik asit) (CH3(CH2)16CO2H)

Stearic acid (STEARIC ACID, stearik asit) is a saturated fatty acid that can deposit on the surface in special conditions. This acid is insoluble in water and soluble in ethanol. The copper substrate should be cleaned, pickled, and soaked in 10% volume HNO3 for oxide elimination. The clean sample should be soaked in ethanolic Stearic acid (STEARIC ACID, stearik asit) solution (0.01 M) and 30 V DC should be applied. The anode and cathode should be made of copper. Studying the X-ray powder diffractometer (XRD) peaks proves the existence of copper stearate components resulting from the reaction of Stearic acid (STEARIC ACID, stearik asit) with copper. The resulting component was studied using SEM (Figure 20). These components provide the necessary roughness and low energy of hydrophobia so the contact angle arrives at 153° and so the hysteresis of the contact angle decreases. Other researchers created a self-assembled layer on porous alumina using Stearic acid (STEARIC ACID, stearik asit).28 This method was performed on anodized aluminum in 0.01 volume of Stearic acid (STEARIC ACID, stearik asit) solution in ethanol for 30 min without applying any potential and superhydrophobia was achieved.CURE SYSTEM: Stearic acid (STEARIC ACID, stearik asit)

The primary function of Stearic acid (STEARIC ACID, stearik asit), normally 1 to 2 phr, is its reaction with zinc oxide to supply a reactive form of zinc for accelerator complexing. Higher concentrations (8 phr) produce minor reductions in viscosity, hysteresis and scorch safety. Swelling in 70°C water is substantially reduced from 15% to 8% at the 8 phr level in SBRs 1502 and 1509 (but not 1500). In a magnesia-zinc activated system, increased Stearic acid (STEARIC ACID, stearik asit) at 6 phr was, except for reduced tensile, without effect.Stearic acid (STEARIC ACID, stearik asit) was dissolved in 100 ml of 1-propanol. After addition of 3.1 ml of water, the solution was stirred for 30 min. Finally, 13.7 g of aluminum sec-butoxide was added and the reaction mixture was stirred for 20 min. The prepared gel was aged at 100 °C for 50 h under static conditions. After cooling, filtration and washing with ethanol, the solid product was dried overnight at 50 °C. Calcination was carried out in a stream of nitrogen at 410 °C and then in air at 420 °C Stearic acid (STEARIC ACID, stearik asit)

Stearic acid (STEARIC ACID, stearik asit) is a saturated monobasic acid with 18 carbon-chain lengths. It is synthesized by the hydrolysis of animal fat or from hydrogenation of cottonseed or vegetable oil. Commercial Stearic acid (STEARIC ACID, stearik asit) is a mixture of Stearic acid (STEARIC ACID, stearik asit) with palmitic and myristic acid. Depending on the ratio of the stearic to palmitic acid, it can vary from macrocrystalline (45:55 w/w) to microcrystalline (between 50:50 and 90:10 w/w) structure (Li & Wu, 2014). Stearic acid (STEARIC ACID, stearik asit) polymorphic forms A, B, and C (most stable) are made using different organic solvents and crystallization conditions (Garti, Wellner, & Sarig, 1980). Thermal studies indicated that Stearic acid (STEARIC ACID, stearik asit) from different suppliers showed little batch-to-batch or manufacturer-to-manufacturer variability (Garti et al., 1980; Inaoka, Kobayashi, Okada, & Sato, 1988).

Because of its lower surface area, Stearic acid (STEARIC ACID, stearik asit) is used at 1%-3% w/w concentration. Because magnesium stearate at a concentration of 0.25% w/w is reported to soften the tablets made with pregelatinized starch and potentially affects tablet strength and dissolution, Stearic acid (STEARIC ACID, stearik asit) is the preferred lubricant for pregelatinized starch. The starch undergoes plastic deformation during tableting and therefore has higher sensitivity to the concentration of magnesium stearate. Also, as reported by Fouda et al., although magnesium stearate accelerated the degradation of aspirin, Stearic acid (STEARIC ACID, stearik asit) can protect drugs (aspirin) against degradation (Fouda, Mady, & El-Azab, 1998). In addition, Stearic acid (STEARIC ACID, stearik asit) also can play a role in the polymorphic phase transformation of drugs, which subsequently resulted in a slowing down of the dissolution of tablets (Wang, Davidovich, et al., 2010). Tablet dissolution was slow because of the transformation of polymorphic forms (Form II to Form I) of the drug, facilitated by Stearic acid (STEARIC ACID, stearik asit) (Wang, Davidovich, et al., 2010).Stearic acid (STEARIC ACID, stearik asit) is a typical example of a fatty acid, which are essentially long hydrocarbon chains containing a carboxyl group at one end and a methyl group at the other. The chain lengths can vary from 3 (propionic acid) to 24 (lignoceric acid) but the majority of fatty acids found in hydrogenated vegetable or animal oils are around C16-C20 in length. Stearic acid (STEARIC ACID, stearik asit) is a saturated acid, since there are no double bonds between neighbouring carbon atoms. This means that the hydrocarbon chain is flexible and can roll up into a ball or stetch out into a long zig-zag.

It is made by extraction from tallow, which is the mixture of fats that are obtained by steam treating cow fat. Tallow contains tristearin (which is just 3 Stearic acid (STEARIC ACID, stearik asit) molecules joined to one glycerol molecule, shown in blue in the figure), which, after heating with sodium hydoxide yields sodium stearate.

Stearic acid (STEARIC ACID, stearik asit)

TCC’s Stearic acid (STEARIC ACID, stearik asit), also called Octadecanoic Acid, is one of the most common long-chain fatty acids. It is found in combined form in natural animal and vegetable fats. Commercial Stearic acid (STEARIC ACID, stearik asit) is a mixture of approximately equal amounts of stearic and palmitic acids and small amounts of oleic acid. It is employed in the manufacture of candles, cosmetics, shaving soaps, lubricants, and pharmaceuticals.

Applications

TCC’s Stearic acid (STEARIC ACID, stearik asit) is mainly used in the production of detergents, soaps, and cosmetics such as shampoos and shaving cream products. Stearic acid (STEARIC ACID, stearik asit) is used along with castor oil for preparing softeners in textile sizing.

Being inexpensively available and chemically benign, Stearic acid (STEARIC ACID, stearik asit) finds many niche applications It is used in the manufacture of candles, and as a hardener in candies when mixed with simple sugar and corn syrup. It is also used to produce dietary supplements.

In fireworks, Stearic acid (STEARIC ACID, stearik asit) is often used to coat metal powders such as aluminum and iron. This prevents oxidation, allowing compositions to be stored for a longer period of time.

Stearic acid (STEARIC ACID, stearik asit) is a common lubricant during injection molding and pressing of ceramic powders. It is also used as a mold release for foam latex that is baked in stone molds.

Stearic acid (STEARIC ACID, stearik asit) (IUPAC systematic name: octadecanoic acid) is one of the useful types of saturated fatty acids that comes from many animal and vegetable fats and oils. It is a waxy solid.

WHAT IS Stearic acid (STEARIC ACID, stearik asit)

Stearic acid (STEARIC ACID, stearik asit) – with the molecular formula C18H36O2, C17H35CO2H, or CH3(CH2)16COOH, and the CAS Number 57-11-4 – is one of the most useful fatty acids with a long carbon chain. Also referred to as octadecanoic acid according to its preferred IUPAC classification, Stearic acid (STEARIC ACID, stearik asit) gets its name from the Greek word meaning tallow.

The ingredient is made predominantly from triglycerides rendered from animal fat. It can be stored at room temperature and is often used in the creation of soaps and candles. Stearic acid (STEARIC ACID, stearik asit) is most often produced through the process of saponification, which converts fats and oils into alcohol and soaps by means of adding heat along with a liquid alkali. Saponification is typically carried out on animal fats and vegetable oils.MANY COMMERCIAL USES FOR Stearic acid (STEARIC ACID, stearik asit)

With its many commercial uses, Stearic acid (STEARIC ACID, stearik asit) is in constant demand across many industries. If you are a supplier of food grade additives and ingredients, you need a Stearic acid (STEARIC ACID, stearik asit) distributor like Brenntag North America. With specialized global distribution experience and facilities that are in full compliance with ISO standards and HACCP food safety regulations.INDUSTRIES IN WHICH Stearic acid (STEARIC ACID, stearik asit) IS COMMONLY USED

Stearic acid (STEARIC ACID, stearik asit) is bifunctional in nature. Its nonpolar chain allows organic solvents to dissolve. Plus, its polar head group can be linked to positively charged metal ions. As a result, its commercial uses fall into several categories. In the food industry, it is used as a food additive, for example as a flavoring agent in certain dairy products to create an artificial flavoring that approximates that of butter. In addition, it is a highly useful binding agent used as a key ingredient in chewing gum, edible waxes, and other candied coatings. This ingredient’s food grade uses also cross over into the pharmaceutical industry, where Stearic acid (STEARIC ACID, stearik asit) is used as an additive in tablets to bind solid ingredients together. That way, the tablets do not disintegrate while in storage in bottles. Furthermore, with the addition of Stearic acid (STEARIC ACID, stearik asit), tablets only release their active ingredients after they reach the acids found in the human stomach. Both the personal care and household products industries rely on Stearic acid (STEARIC ACID, stearik asit) to produce a variety of detergents, soaps, and cosmetics. For example, shampoos, shaving creams, and soaps derive their pearly appearance from esters of Stearic acid (STEARIC ACID, stearik asit). In addition, the fatty acid is used as a lubricant – lithium stearate, for instance, is one of the main components of grease. Furthermore, it is used as a softening agent in various manufacturing processes ranging from softening PVC to the manufacture of automotive tires. As a cost-effective and benign additive, Stearic acid (STEARIC ACID, stearik asit) has several niche uses. It is used to coat iron and aluminum in the fabrication of fireworks. It is also used in the production of lead-acid batteries. Along with corn syrup or sugar, it is used as a hardening agent in the making of candles. Plus, it is used as a lubricating and release agent in several molding and casting processes, ranging from releasing foam latex from stone molds to lubricating ceramic powders employed in injection molds.CHEMICAL PROPERTY INFORMATION FOR Stearic acid (STEARIC ACID, stearik asit)

After palmitic acid, Stearic acid (STEARIC ACID, stearik asit) is one of the most naturally occurring saturated fatty acids. It is a waxy, colorless solid that is practically insoluble in water. Its esters and salts are referred to as stearates, and the triglyceride stearin is produced from three of its molecules.

Stearic acid (STEARIC ACID, stearik asit) (/ˈstɪərɪk/ STEER-ik, /stiˈærɪk/ stee-ARR-ik) is a saturated fatty acid with an 18-carbon chain. The IUPAC name is octadecanoic acid. It is a waxy solid and its chemical formula is C17H35CO2H. Its name comes from the Greek word στέαρ “stéar”, which means tallow. The salts and esters of Stearic acid (STEARIC ACID, stearik asit) are called stearates. As its ester, Stearic acid (STEARIC ACID, stearik asit) is one of the most common saturated fatty acids found in nature following palmitic acid.[10] The triglyceride derived from three molecules of Stearic acid (STEARIC ACID, stearik asit) is called stearin.

Production of Stearic acid (STEARIC ACID, stearik asit)

Stearic acid (STEARIC ACID, stearik asit) is obtained from fats and oils by the saponification of the triglycerides using hot water (about 100 °C). The resulting mixture is then distilled.[11] Commercial Stearic acid (STEARIC ACID, stearik asit) is often a mixture of stearic and palmitic acids, although purified Stearic acid (STEARIC ACID, stearik asit) is available.

Fats and oils rich in Stearic acid (STEARIC ACID, stearik asit) are more abundant in animal fat (up to 30%) than in vegetable fat (typically <5%). The important exceptions are the foods cocoa butter (34%)[12] and shea butter, where the Stearic acid (STEARIC ACID, stearik asit) content (as a triglyceride) is 28-45%.[13]

In terms of its biosynthesis, Stearic acid (STEARIC ACID, stearik asit) is produced from carbohydrates via the fatty acid synthesis machinery wherein acetyl-CoA contributes two-carbon building blocks.

Uses of Stearic acid (STEARIC ACID, stearik asit)

In general, the applications of Stearic acid (STEARIC ACID, stearik asit) exploit its bifunctional character, with a polar head group that can be attached to metal cations and a nonpolar chain that confers solubility in organic solvents. The combination leads to uses as a surfactant and softening agent. Stearic acid (STEARIC ACID, stearik asit) undergoes the typical reactions of saturated carboxylic acids, a notable one being reduction to stearyl alcohol, and esterification with a range of alcohols. This is used in a large range of manufactures, from simple to complex electronic devices.

As food additive

Stearic acid (STEARIC ACID, stearik asit) (E number E570) is found in some foods.[14]

Soaps, cosmetics, detergents

Stearic acid (STEARIC ACID, stearik asit) is mainly used in the production of detergents, soaps, and cosmetics such as shampoos and shaving cream products. Soaps are not made directly from Stearic acid (STEARIC ACID, stearik asit), but indirectly by saponification of triglycerides consisting of Stearic acid (STEARIC ACID, stearik asit) esters. Esters of Stearic acid (STEARIC ACID, stearik asit) with ethylene glycol, glycol stearate, and glycol distearate are used to produce a pearly effect in shampoos, soaps, and other cosmetic products. They are added to the product in molten form and allowed to crystallize under controlled conditions. Detergents are obtained from amides and quaternary alkylammonium derivatives of Stearic acid (STEARIC ACID, stearik asit).

Lubricants, softening and release agents

In view of the soft texture of the sodium salt, which is the main component of soap, other salts are also useful for their lubricating properties. Lithium stearate is an important component of grease. The stearate salts of zinc, calcium, cadmium, and lead are used to soften PVC. Stearic acid (STEARIC ACID, stearik asit) is used along with castor oil for preparing softeners in textile sizing. They are heated and mixed with caustic potash or caustic soda. Related salts are also commonly used as release agents, e.g. in the production of automobile tires. As an example, it can be used to make castings from a plaster piece mold or waste mold, and to make a mold from a shellacked clay original. In this use, powdered Stearic acid (STEARIC ACID, stearik asit) is mixed in water and the suspension is brushed onto the surface to be parted after casting. This reacts with the calcium in the plaster to form a thin layer of calcium stearate, which functions as a release agent.[15]

When reacted with zinc it forms zinc stearate, which is used as a lubricant for playing cards (fanning powder) to ensure a smooth motion when fanning. Stearic acid (STEARIC ACID, stearik asit) is a common lubricant during injection molding and pressing of ceramic powders.[16] It is also used as a mold release for foam latex that is baked in stone molds.

Niche uses

Being inexpensive, nontoxic, and fairly inert, Stearic acid (STEARIC ACID, stearik asit) finds many niche applications.[11] Stearic acid (STEARIC ACID, stearik asit) is used as a negative plate additive in the manufacture of lead-acid batteries. It is added at the rate of 0.6 g per kg of the oxide while preparing the paste. It is believed to enhance the hydrophobicity of the negative plate, particularly during dry-charging process. It also reduces the extension of oxidation of the freshly formed lead (negative active material) when the plates are kept for drying in the open atmosphere after the process of tank formation. As a consequence, the charging time of a dry uncharged battery during initial filling and charging (IFC) is comparatively lower, as compared to a battery assembled with plates which do not contain Stearic acid (STEARIC ACID, stearik asit) additive. Fatty acids are classic components of candle-making. Stearic acid (STEARIC ACID, stearik asit) is used along with simple sugar or corn syrup as a hardener in candies. In fireworks, Stearic acid (STEARIC ACID, stearik asit) is often used to coat metal powders such as aluminium and iron. This prevents oxidation, allowing compositions to be stored for a longer period of time.

Metabolism

An isotope labeling study in humans[17] concluded that the fraction of dietary Stearic acid (STEARIC ACID, stearik asit) that oxidatively desaturates to oleic acid is 2.4 times higher than the fraction of palmitic acid analogously converted to palmitoleic acid. Also, Stearic acid (STEARIC ACID, stearik asit) is less likely to be incorporated into cholesterol esters. In epidemiologic and clinical studies, Stearic acid (STEARIC ACID, stearik asit) was found to be associated with lowered LDL cholesterol in comparison with other saturated fatty acids.[18]

Salts and esters

Stearates are the salts or esters of Stearic acid (STEARIC ACID, stearik asit). The conjugate base of Stearic acid (STEARIC ACID, stearik asit), C17H35COO-, is also known as the stearate anion.

Stearic acid (STEARIC ACID, stearik asit), also known as stearate or 18:0, belongs to the class of organic compounds known as long-chain fatty acids. These are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms. Stearic acid (STEARIC ACID, stearik asit) exists as a solid and is considered to be practically insoluble (in water) and relatively neutral. Stearic acid (STEARIC ACID, stearik asit) has been found throughout most human tissues, and has also been detected in most biofluids, including blood, urine, sweat, and saliva. Within the cell, Stearic acid (STEARIC ACID, stearik asit) is primarily located in the cytoplasm, membrane (predicted from logP), myelin sheath and adiposome. Stearic acid (STEARIC ACID, stearik asit) exists in all eukaryotes, ranging from yeast to humans. Stearic acid (STEARIC ACID, stearik asit) participates in a number of enzymatic reactions. In particular, Dhap(18:0E) and Stearic acid (STEARIC ACID, stearik asit) can be biosynthesized from dhap(18:0) and octadecanol; which is catalyzed by the enzyme dihydroxyacetone phosphate acyltransferase and alkyldihydroxyacetonephosphate synthase. In addition, Stearic acid (STEARIC ACID, stearik asit) can be biosynthesized from stearoyl-CoA through its interaction with the enzyme acyl-CoA thioesterase. In humans, Stearic acid (STEARIC ACID, stearik asit) is involved in plasmalogen synthesis pathway. Stearic acid (STEARIC ACID, stearik asit) is also involved in the metabolic disorder called the mitochondrial Beta-oxidation OF long chain saturated fatty acids pathway. Outside of the human body, Stearic acid (STEARIC ACID, stearik asit) can be found in a number of food items such as common cabbage, tamarind, breadnut tree seed, and pili nut. This makes Stearic acid (STEARIC ACID, stearik asit) a potential biomarker for the consumption of these food products. Stearic acid (STEARIC ACID, stearik asit) is a potentially toxic compound.

Animal cells can de novo synthesize palmitic and stearic fatty acid and their n-9 derivatives. However, de novo synthesis requires the utilization of energy. Palmitic acid (C16) is the immediate precursor of Stearic acid (STEARIC ACID, stearik asit) (C18). In animal cells, oleic acid is created by the dehydrogenation (desaturation) of Stearic acid (STEARIC ACID, stearik asit). Oleic acid is further elongated and desaturated into a family of n-9 fatty acids. The demand for energy used to synthesize n-9 fatty acids can be reduced in cell culture by providing palmitic and Stearic acid (STEARIC ACID, stearik asit)s. In addition, since palmitic and Stearic acid (STEARIC ACID, stearik asit) are saturated, they are not peroxidized during delivery to the cells.

A mild moisturizing body wash with Stearic acid (STEARIC ACID, stearik asit), a key component of corneum lipids, and emollient soybean oil has been introduced in the market place. The objectives of this study are to determine the amount and the location of the Stearic acid (STEARIC ACID, stearik asit) in the corneum after in vivo cleansing by the formulation. Clinical cleansing studies for one and five consecutive days were carried out with the formulation containing soybean oil or petroleum jelly (PJ). The free Stearic acid (STEARIC ACID, stearik asit) in it was replaced by the fully deuterated variant. The amounts of Stearic acid (STEARIC ACID, stearik asit) in 10 consecutive corneum tape strips were measured by liquid chromatograph-mass spectroscopy. Separately, electron paramagnetic resonance (EPR) measurements were taken with a porcine skin after a wash by the soybean oil formulation with its free fatty acid replaced by its spin probe analogue, 5-doxyl Stearic acid (STEARIC ACID, stearik asit). Deuterated Stearic acid (STEARIC ACID, stearik asit) was detected in all 10 consecutive layers of stratum corneum and the total amount after five washes with the soybean oil formulation was 0.33 ug/sq cm.

Stearic acid (STEARIC ACID, stearik asit) metabolism via beta-oxidation, omega-oxidation, and (omega-1)-oxidation has been demonstrated in rat liver. Removal of a single acetate moiety can occur to produce palmitic acid, and both this and Stearic acid (STEARIC ACID, stearik asit) may be desaturated, producing oleic and palmitoleic acids, respectively. After (l4)C Stearic acid (STEARIC ACID, stearik asit) was injected into rats, about 50 percent of the liver (14)C was recovered as oleic acid, indicating that extensive desaturation occurs. Desaturation occurs only to a small extent extrahepatically but has been detected in adipose tissue and in cells of mammary tissue. Stearic acid (STEARIC ACID, stearik asit) is also incorporated into phospholipids, di- and triglycerides, cholesterol, cholesterol esters, and other sterol esters.

Stearic acid (STEARIC ACID, stearik asit) is a colorless, waxy solid or white-to yellow powder or crystals. It has an odor and taste like tallow. It has a low solubility in water. Stearic acid (STEARIC ACID, stearik asit) occurs naturally in many plant and animal fats. USE: Stearic acid (STEARIC ACID, stearik asit) is an important commercial chemical. It is used in pharmaceuticals, cosmetics, soaps, phonograph records, insulators, candles, food packaging, modeling compounds and in making other chemicals. It is an ingredient in some pesticides. EXPOSURE: Workers that use Stearic acid (STEARIC ACID, stearik asit) may breathe in mists or have direct skin contact. The general population may be exposed by dermal contact with personal care items, smoking cigarettes, inhalation of air and consumption of food and drinking water. If Stearic acid (STEARIC ACID, stearik asit) is released to the environment, it will be broken down in air. Stearic acid (STEARIC ACID, stearik asit) released to air will also be in or on particles that eventually fall to the ground. It is not expected to be broken down by sunlight. It will not move into air from moist soil and water surfaces. It is not expected to move through soil. It will be broken down by microorganisms, and is not expected to build up in fish. RISK: Stearic acid (STEARIC ACID, stearik asit) is a Generally Regarded As Safe (GRAS) chemical at levels found in consumer products. Minimal skin irritation has been reported in some people following skin application of diluted Stearic acid (STEARIC ACID, stearik asit) or cosmetics containing Stearic acid (STEARIC ACID, stearik asit). No evidence of allergic skin reactions was observed following repeat skin applications. Blood cholesterol metabolism, rate of blood clot formation, and blood glucose levels may be affected by the amount of Stearic acid (STEARIC ACID, stearik asit) in the diet, but available data are inconclusive. Altered blood parameters were observed in laboratory animals following repeated skin application of a cosmetic formulation containing Stearic acid (STEARIC ACID, stearik asit). Decreased blood clotting, increased cholesterol levels, and decreased weight gain were observed in laboratory animals fed moderate levels of Stearic acid (STEARIC ACID, stearik asit) in their diet over time. At extremely high doses, heart irregularities, muscle spasms, paralysis, anorexia, severe lung infections and death were reported. No tumors developed following exposure in food or via injection. Data on the potential for Stearic acid (STEARIC ACID, stearik asit) to cause infertility, abortion, or birth defects in laboratory animals were not available. The potential for Stearic acid (STEARIC ACID, stearik asit) to cause cancer in humans has not been assessed by the U.S. EPA IRIS program, the International Agency for Research on Cancer, or the U.S. National Toxicology Program 14th Report on Carcinogens.

There are/ three types of Stearic acid (STEARIC ACID, stearik asit) distinguished by average Stearic acid (STEARIC ACID, stearik asit) concentration. These Stearic acid (STEARIC ACID, stearik asit)s, 37.5%, 42.5%, and 95.0%, have minimum Stearic plus Palmitic Acid concentrations of 89.0%, 94.0%, and 97.5%, respectively. Regular pharmaceutical grade Stearic acid (STEARIC ACID, stearik asit) specifies a 40,0% minimum of either Stearic or Palmitic Acid and a 90.0% minimum for their sum. Purified pharmaceutical grade Stearic acid (STEARIC ACID, stearik asit) specifies a 90.0% minimum Stearic acid (STEARIC ACID, stearik asit) content and a 96.0% minimum for the sum.

Stearic acid (STEARIC ACID, stearik asit) is used in animal cell culture. HUMAN STUDIES: The greatest danger from ingestion of large quantities of Stearic acid (STEARIC ACID, stearik asit) is intestinal obstruction. Skin sensitization is unusual. Aspiration or inhalation of Stearic acid (STEARIC ACID, stearik asit) could cause chemical pneumonitis. Implantation of Stearic acid (STEARIC ACID, stearik asit) will cause foreign body reaction. ANIMAL STUDIES: Skin lotion formulations containing 2.8% Stearic acid (STEARIC ACID, stearik asit) administered at doses of 15 g/kg by gavage to groups of 10 rats resulted in 1 death. Normal behavior and appearance were observed, and there were no gross alterations in surviving rats. No ocular irritation was produced in 6 rabbits by commercial grade Stearic acid (STEARIC ACID, stearik asit), whereas mild conjunctival erythema was produced in 3 of 6 rabbits by commercial grade triple-pressed Stearic acid (STEARIC ACID, stearik asit). Treatment with 35% Stearic acid (STEARIC ACID, stearik asit) in corn oil and 50% Stearic acid (STEARIC ACID, stearik asit) in petrolatum was primarily producing mild conjunctival erythema, which had subsided within 2 days. Intravenous infusion of large doses of Stearic acid (STEARIC ACID, stearik asit) were thrombogenic in rats, rabbits, and dogs, causing blood platelet aggregation and acute heart failure. When diets containing 5 to 50% Stearic acid (STEARIC ACID, stearik asit) (as the monoglyceride) were fed to weanling mice for 3 weeks, depression of weight gain was seen above the 10% dietary level. Mortality occurred only with the 50% diet. The effects were less noticeable in adult mice. Rats fed 5% Stearic acid (STEARIC ACID, stearik asit) as part of a high-fat diet for 6 weeks, or 6% Stearic acid (STEARIC ACID, stearik asit) for 9 weeks, showed a decreased blood clotting time and hyperlipemia. Rats fed 50 g/kg/day Stearic acid (STEARIC ACID, stearik asit) for 24 weeks developed reversible lipogranulomas in adipose tissue. No significant pathological lesions were observed in rats fed 3000 ppm Stearic acid (STEARIC ACID, stearik asit) orally for about 30 weeks, but anorexia, increased mortality, and a greater incidence of pulmonary infection were observed. Single intraperitoneal doses of Stearic acid (STEARIC ACID, stearik asit) in mice, ranging from approximately 15 to 500 mg/kg, caused no fatalities, but at the highest dose level caused a loss of body weight. In cats, low doses of Stearic acid (STEARIC ACID, stearik asit) produced elevated pulmonary but decreased systemic blood pressure. Doses greater than 5 mg caused apnea, a fall in blood pressure, and convulsions leading to death. Stearic acid (STEARIC ACID, stearik asit) was tested for mutagenicity using the Ames test with Salmonella typhimurium strains TA98, TA100, TA1535, TA1537, and TA1538. Stearic acid (STEARIC ACID, stearik asit) had no mutagenic activity over background in the strains tested with and without metabolic activation.

Stearic acid (STEARIC ACID, stearik asit) causes hypercoagulability of the blood by activation of factor XII and by aggregation of blood platelets. Injection of unbound Stearic acid (STEARIC ACID, stearik asit) (sodium salt) into the systemic circulation of dogs was followed by massive generalized thrombosis and sudden death. Similar infusions into birds, which are deficient in factor XII, did not cause hypercoagulability or thrombosis. The effects of the long-chain saturated fatty acids could be prevented by using albumin to bind the Stearic acid (STEARIC ACID, stearik asit) at a molar ratio of free fatty acid (FFA) to albumin of < 2. The major issue is whether eating foods rich in Stearic acid (STEARIC ACID, stearik asit) can cause a thrombogenic effect.

A preparation of 65% Stearic acid (STEARIC ACID, stearik asit) in ethylene oxide produced erythema and minimal edema 24 and 72 hr after application to intact and abraded sites on the skin of 6 NZW rabbits. The PII for this single insult occlusive patch test (SIOPT) was 3.00. No irritation was observed in single insult occlusive patch test SIOPT studies involving 4-hr exposures of intact and abraded skin of 6 albino rabbits to 45 and 59% Stearic acid (STEARIC ACID, stearik asit) in combination with “other fatty acids.” Two-hour exposures of the skin of 9 albino rabbits to 35% Stearic acid (STEARIC ACID, stearik asit) in water and 50% Stearic acid (STEARIC ACID, stearik asit) in petrolatum resulted in respective PIIs of 0.33 and 0.56. Transient mild erythema and no edema were observed in both SIOPT studies.

Stearic acid (STEARIC ACID, stearik asit)’s production and use in the manufacture of chemicals, especially for stearates and stearate driers, lubricants and soaps, in pharmaceuticals and cosmetics, as an accelerator activator, as a dispersing agent and softener in rubber compounds, in shoe and metal polishes, coatings, food packaging, suppositories and ointments, may result in its release to the environment through various waste streams. Its use as an inert ingredient in pesticides may result in its direct release to the environment. Stearic acid (STEARIC ACID, stearik asit) is a fully saturated fatty acid and occurs as a glyceride in tallow and other animal fats and oils, as well as in some vegetable oils. Fatty acids are an important part of the normal daily diet of mammals, birds and invertebrates. Stearic acid (STEARIC ACID, stearik asit) is found in low percentages in cotton, coconut, palm kernel, corn, palm, castor, rapeseed, soybean, sunflower, herring, and tallow oils, and in several varieties of rice. If released to air, an estimated vapor pressure of 7.2X10-7 mm Hg at 25 °C indicates Stearic acid (STEARIC ACID, stearik asit) will exist in both the vapor and particulate phases in the atmosphere. Vapor-phase Stearic acid (STEARIC ACID, stearik asit) will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals; the half-life for this reaction in air is estimated to be 17 hours. Particulate-phase Stearic acid (STEARIC ACID, stearik asit) will be removed from the atmosphere by wet and dry deposition. Stearic acid (STEARIC ACID, stearik asit) does not contain chromophores that absorb at wavelengths >290 nm and, therefore, is not expected to be susceptible to direct photolysis by sunlight. If released to soil, Stearic acid (STEARIC ACID, stearik asit) is expected to have no mobility based upon an estimated Koc of 5.1X10+4. The estimated pKa of Stearic acid (STEARIC ACID, stearik asit) is 4.75, indicating that this compound will exist almost entirely in the anion form in the environment and anions generally do not adsorb more strongly to soils containing organic carbon and clay than their neutral counterparts. Volatilization from moist soil surfaces is not expected to be an important fate process because the compound exists as an anion and anions do not volatilize. Stearic acid (STEARIC ACID, stearik asit) is not expected to volatilize from dry soil surfaces based upon its estimated vapor pressure. Utilizing a modified OECD screening test Stearic acid (STEARIC ACID, stearik asit) reached 79% of its theoretical BOD in 28 days, suggesting that biodegradation is an important fate process in soil. If released into water, the neutral species of Stearic acid (STEARIC ACID, stearik asit) is expected to adsorb to suspended solids and sediment based upon the estimated Koc. The stearate, the anion of Stearic acid (STEARIC ACID, stearik asit), is expected to adsorb to suspended solids and sediment based on experimental studies averaging 99% adsorption. A 5-day theoretical BOD of 43.9% using activated sludge suggests that biodegradation may be an important fate process in water. The estimated pKa indicates Stearic acid (STEARIC ACID, stearik asit) will exist almost entirely in the anion form at pH values of 5 to 9 and therefore volatilization from water surfaces is not expected to be an important fate process. An estimated BCF of 10 suggests the potential for bioconcentration in aquatic organisms is low. Hydrolysis is not expected to be an important environmental fate process since this compound lacks functional groups that hydrolyze under environmental conditions. Occupational exposure to Stearic acid (STEARIC ACID, stearik asit) may occur through inhalation of dust and dermal contact with this compound at workplaces where Stearic acid (STEARIC ACID, stearik asit) is produced or used. Monitoring data indicate that the general population may be exposed to Stearic acid (STEARIC ACID, stearik asit) via inhalation of ambient air and tobacco smoke, ingestion of food and drinking water, and dermal contact with this compound and other consumer products containing Stearic acid (STEARIC ACID, stearik asit).

Stearic acid (STEARIC ACID, stearik asit) was identified, concentration unknown, as a component of influent and effluent gas samples taken from refuse waste in Singapore(1). Stearic acid (STEARIC ACID, stearik asit) was found in candle smoke from paraffin and beeswax at 10.66 and 1.85 mg/g of organic compounds(2). Stearic acid (STEARIC ACID, stearik asit) was found in wood smoke from red maple(3), red oak(3), white birch(3), white pine(3), hemlock(3), balsam fir(3), yellow poplar(4), white ash(4), sweet gum(4), mockernut hickory(4), loblolly pine(4), and slash pine(4). Stearic acid (STEARIC ACID, stearik asit) was detected in wood smoke from pine, oak and synthetic logs at 4.31, 3.33 and 2.33 mg/kg of wood burnt(5). Stearic acid (STEARIC ACID, stearik asit) was found at 4.32, 2.77 and 1.95 mg/kg of burnt wood in the particulate phase(6). Stearic acid (STEARIC ACID, stearik asit) was found in extract from a pine wood burning campfire at 570 ng/g(7). Stearic acid (STEARIC ACID, stearik asit) was found in the fine aerosols from boilers burning number 2 distillate fuel oil(8). Stearic acid (STEARIC ACID, stearik asit) was identified in the emissions of a municipal waste incineration plant in Germany(9). Stearic acid (STEARIC ACID, stearik asit) was identified in vapor at a concentration of 80 ng/cu m and on particles with a concentration of 40 to 150 ng/g emitted during combustion of coal at Ames power plant in Iowa(10). Stearic acid (STEARIC ACID, stearik asit) was found at 823.4 ug/g from heated roofing tar pot fumes(11). Stearic acid (STEARIC ACID, stearik asit) was found in gas and particulate matter effluents from commercial-scale meat charbroiling operations at 2,150 and 96,000 ug/kg meat cooked, respectively(12).

Fine particle aerosol emission rates for Stearic acid (STEARIC ACID, stearik asit) from noncatalyst automobiles, catalyst automobiles, and heavy-duty diesel trucks were determined to be 3.0, 18.0, and 72.5 ug/km, respectively(1). Stearic acid (STEARIC ACID, stearik asit) was identified in tire wear particles, brake lining particles, and road dust particles at concentrations of 6,009.0, 79.5, and 689.0 ug/g of particle sample, respectively(2). Stearic acid (STEARIC ACID, stearik asit) was emitted from medium duty diesel trucks at 362 ug/km(3). Stearic acid (STEARIC ACID, stearik asit) was found in fine particulate abrasion products from green leaves at a concentration of 210.2 ug/g and from dead leaves at a concentration of 200.9 ug/g; samples collected were from trees characteristic of the Los Angeles, CA area(4). Fine particle emission rates for Stearic acid (STEARIC ACID, stearik asit) from a natural gas-fired water heater and a natural gas-fired space heater were determined(5). A HEPA-filtered dilution air sample emission rate for Stearic acid (STEARIC ACID, stearik asit) was determined to be 2.6 pg/kJ; the emission rate for Stearic acid (STEARIC ACID, stearik asit) through the first filter was determined to be 81.8 pg/kJ; the emission rate for Stearic acid (STEARIC ACID, stearik asit) through the backup filter was not determined(5). The emission rate for Stearic acid (STEARIC ACID, stearik asit) from motor vehicles in the Van Nuys tunnel in Los Angeles at 302.9 mg/L of gasoline-equivalent fuel burned, sampled on Sept 21, 1993(6). Stearic acid (STEARIC ACID, stearik asit) was measured in the emissions of gasoline powered motor vehicles at a rate of 4.32 ug/km and 147 ug/km for catalyst equipped engines and non-catalyst equipped engines(7).

Stearic acid (STEARIC ACID, stearik asit) was detected, not quantified in settled household dust samples collected from 12 houses in urban areas of central Finland(1). Stearic acid (STEARIC ACID, stearik asit) was identified in 7 of 10 commercially available coffee filter papers(2). Stearic acid (STEARIC ACID, stearik asit) was found in unburned paraffin and beeswax at 25.56 and 0.75 mg/g of wax(3). Urban runoff was sampled from several residential landscaped, commercial, and industrial areas near Madrid, Spain from May 1985 to July 1985 and were found to contain Stearic acid (STEARIC ACID, stearik asit)(4). Stearic acid (STEARIC ACID, stearik asit) has been identified as a constituent of tobacco, tobacco smoke, and tobacco smoke substitute(5).

Stearik Asit (STEARIC ACID)

Stearik asit ve bileikleri, özellikle tuzlar (stearatlar) ticari önemi haizdirler. Uzun zincirli alkol esterleri, mum olarak bilinmektedir. Dier monohidrik ve polihidrik alkollerin esterleri, vernik imalinde ve iyonik olmayan yüzey aktif maddelerin üretiminde kullanlmaktadr. Alkali metal tuzlar suda çözünebilir. Bunlar oleatlar ve palmitatlar gibi, tuvalet ve çamar sabunlarnn esas maddeleridir. Metalik stearatlar petrol gres yalarnn terkibinde bulunmaktadr. Çinko stearatlar kozmetikte, dier metal tuzlar boyalarda, eczaclkta ve mantar öldürücü imalatnda kullanlr. Stearik asit amidleri, su geçirmez kumalarn imalatnda kullanlr.

Stearik asit hayvani yalardan hidrolizle elde edilir. Ticari ürün ekseriya stearik, palmitik ve dier ya asitlerinin bir karmdr. Saf madde olarak fraksiyonlu destilasyonla ayrlabilir. Ayrca soya ya veya dier bitki yalarnn hidrojenasyonuyla hazrlanmaktadr.

Saf stearik asit, beyaz kristaller halindedir. Younluu 0,847, ergime noktas 69-70 °C, kaynama noktas 383 °C’dir.Stearik Asit

Stearik asit en yaygn uzun zincirli (18 C) ya asididir. Bipolar yapsndan dolay etkili bir yüzey aktif madde ve yumuatc olarak kullanm bulur. Stearik asit tuzlar yüksek kaydrclk özelliine sahiptir ve PVC uygulamalarnda kaydrc olarak da kullanlmaktadr.

Kullanm Alanlar: Gda, elektronik, deterjan, sabun, kozmetik, tekstil.Stearik Asit

Stearik asit; CH3(CH2)16COOH formülüne sahip doadaki en bilinen 18 karbonlu uzun zincirli alifatik bir karboksilik doymu ya asididir.

Stearik asit balca; tekstil sektöründe yardmc madde, mum ve pastel boya yapmnda sertletirici, kozmetik sektöründe emülgatör ve kauçuk sektöründe hzlandrc olmak üzere bir çok alanda kullanlmaktadr.

STEARK AST CH3(CH2)16COOH

CH3(CH2)16COOH

Tanm: Kremsi beyaz toz.

Ambalaj birimi: 25 kg’lk torbalarda.

CAS No: 57-11-4

EINECS No: 200-313-4

Kimyasal ad: n-octadekanoat; 1-heptadekankarboksilik asit

Spesifikasyonlar:

Asit deeri: 208,7

Saponifikasyon deeri: 209,7

yot deeri: 0,24

Titre: 55,6 oC

Renk (5 ¼ lovibond cell): 0,1R 1,0Y

Mol arl: 284,48g/mol

Sudaki çözünürlük,23 oC :0,1-1g/100ml

Yal Asit Bileimi %

C12: NIL

C18: 44,06

C14: NIL

C18:1

C16 : 55,67

Dierleri : 0,27

Özellikler: Doadaki en bilinen 18 karbonlu uzun zincirli alifatik bir karboksilik ya asididir. Bitkisel ve hayvansal yadan türetilir. Süt yalar (%5-15), domuz ya (%10), donya (% 15-30), kakao ve shea aac ya (% 30-35) stearik asidin en zengin kaynaklardr. Stearik asit, hidrojene kat ve sv yalarn ana bileenidir (yaklak % 90). Uzun hidrokarbon zinciri hidrofobiktir, suyun yerine kat ve sv yalar çeker. Bir çok doymu yan aksine sterarik asit kandaki kolesterol seviyesini yükseltmez. Çünkü sindirim srasnda karacierdeki enzimler onu doymam yaa dönütürür.

Kullanm alanlar: laç ve kozmetik sanayiinde emülgatör olarak, tekstilde yardmc madde olarak kullanlmaktadr. Stearik asidin sud kostik ile muamelesiyle tra sabunu elde edilebilir. Yaygn bir ekilde bir yalayc ve endüstriyel preparatlarda bir katk olarak kullanlr. Metalik stearatlar, ilaçlar, sabunlar, kozmetikler ve gda ambalaj üretiminde kullanlr. Kauçuklarda bir yumuatc, hzlandrc aktivatör ve datc ajan olarak kullanlr. Mayonez ve teraya gibi bir karmda olduu gibi, bir emülsifiye edici olarak ya ve suyu kartrmaya yardm eder. Dier kullanm alanlar; mum, köpük önleyici, yalayc ajan, balmumu esteri, amin ve hidrolik ajan uygulamalardr.

Stearik asit, CH3(CH2)16COOH formülüyle gösterilen doymu bir ya asididir. Çou hayvan ve bitkiden elde edilen kat-sv yalarda, ekseriya gliserid stearin eklinde bulunur.

Saf stearik asit, beyaz kristaller halindedir. Younluu 0,847, ergime noktas 69-70 °C, kaynama noktas 383 °C’dir.

Stearik asit (stearic acid), 18 karbonlu bir omurgaya sahip, doymu uzun zincirli bir ya asididir. Stearik asit (stearic acid), çeitli hayvan ve bitki yalarnda bulunur ve kakao ya ve karite yann önemli bir bileenidir. Oktadekanoik asit, birçok hayvansal ve bitkisel lipitin C18 düz zincirli doymu ya asidi bileenidir. Diyette olduu gibi sabunlarn sertletirilmesinde, plastiklerin yumuatlmasnda ve kozmetik, mum ve plastik yapmnda kullanlr. Bitki metaboliti, insan metaboliti, Daphnia magna metaboliti ve algal metaboliti olarak rol oynar. Uzun zincirli bir ya asidi, düz zincirli bir doymu ya asidi ve doymu bir ya asididir. Bir oktadekanoatn elenik asididir. Bir oktadekan hidritinden elde edilir. Stearik asit (stearic acid), hafif bir kokuya sahip beyaz bir katdr. Suda yüzer Alternatif Balklar: n-oktadekanoik asit, oktadekanoik asit

Stearik asit (stearic acid), doal hayvansal ve bitkisel yalarda birleik formda bulunan en yaygn uzun zincirli ya asitlerinden biri olan Octadecanoic Acid olarak da adlandrlr. Ticari “Stearik asit (stearic acid)”, yaklak olarak eit miktarlarda stearik ve palmitik asitler ile küçük miktarlarda oleik asitin bir karmdr. Mum, kozmetik, tra sabunu, kayganlatrc ve ilaç yapmnda kullanlr.

Stearik asidin yapsal formülü.

Doas gerei Stearik asit (stearic acid), esas olarak dier uzun zincirli asitlerle kark trigliserit veya ya olarak ve bir ya alkolünün bir esteri olarak ortaya çkar. Hayvansal yada bitkisel yaa göre çok daha fazladr; domuz ya ve don ya genellikle yüzde 30’a kadar Stearik asit (stearic acid) içerir.

Yalarn alkali hidrolizi veya sabunlatrlmas, ya asitlerinin sodyum veya potasyum tuzlar olan sabunlar verir; saf Stearik asit (stearic acid), asitlerin veya uygun türevlerin kristalizasyonu, vakumla damtlmas veya kromatografisiyle böyle bir karmdan güçlükle elde edilir. Saf asit, karboksilik asitlere özgü kimyasal reaksiyonlara maruz kalr. Renksiz, mumsu bir katdr ve suda neredeyse çözünmezdir.Stearik asit (stearic acid), Amerika Birleik Devletleri’nde satlan 3.200’den fazla cilt ve saç bakm ürününün üretiminde kullanlan çok yaygn bir amino asittir. Ürün etiketlerinde bazen Century 1240, setilasetik asit, Emersol 120, Emersol 132, Emersol 150, Formula 300 ve Glycon DP gibi baka isimler altnda listelenir.

Black Friday için, kasada CYBER kodunu girerek birçok profesyonel cilt bakm markasnda% 25 indirim elde edebilirsiniz, Stearik asit (stearic acid) içeren ürünleri aryorsanz kullanldr.

Stearik asit (stearic acid) nerede bulunur?

Doada Stearik asit (stearic acid), bitki ve hayvanlarn kat ve sv yalarnda bulunur. Hayvansal ya numuneleri tipik olarak% 30 Stearik asit (stearic acid)ten oluur. Dokuz kat daha fazla Stearik asit (stearic acid) içeren kakao ya ve shea ya haricinde, çou bitki ya hacimlerinin% 5’ini amino asitten alr.Stearik asit (stearic acid) nasl üretilir?

Maddeyi izole etmek için amino asit içeren kat ya veya sv ya stlr ve basnçlandrlr. Daha sonra malzeme bir damtma makinesinde kaynar suya yerletirilir. Bu cihaz, kat veya sv ya numunelerini kaynatarak aça çkan buhar yakalar ve daha sonra bir dizi soutulmu bobin araclyla tar. Scaklktaki ani düü, stearik asidin younlamasna ve sv hale gelmesine neden olur. Daha sonra mumsu bir kat madde üretmek için daha da soutulabilir. Stearik asit (stearic acid) ne için kullanlr?

Stearik asidin en büyük kullanmlarndan biri sabun üretimidir. Bu ürünlere eklendiinde amino asit, kat bir çubuk oluturmak için dier bileenlerin kalnlamasna ve sertlemesine yardmc olur. Stearik asit (stearic acid) ayrca onu sabunlarda faydal klan önemli temizleme özelliklerine sahiptir. Bileen, yalarn yüzey gerilimini düüren bir madde olan bir yüzey aktif madde görevi görür. Yalar normal sudan daha yüksek yüzey gerilimine sahiptir, bu nedenle su damlacklar yalarla kolayca karmaz. Stearik asit (stearic acid), yan yüzey gerilimini düürerek, suyun ya molekülleri ile birlemesine ve onlar ykamasna izin verir. Sonuç olarak Stearik asit (stearic acid) cilt ve saçtaki kiri, teri ve fazla sebumu gidermeye yardmc olur. Bu, onu temizleyiciler, vücut ykamalar ve ampuanlarn yan sra kalp sabunlarnda yararl bir bileen yapar. Stearik asit (stearic acid) neden bu kadar çok üründe bulunur?

Stearik asit (stearic acid), su ve ya karmna yardmc olduu için, içerik ayn zamanda birçok sv kozmetik ve cilt ve saç bakm ürününe, bir aktif bileen veya temizlik maddesinden ziyade bir katk maddesi olarak ilev görmek için düük konsantrasyonlarda eklenir. Bu ürünlerde Stearik asit (stearic acid), formüllerin sv ve yal katmanlara ayrlmasn önlemeye yardmc olur. Sonuç olarak, Stearik asit (stearic acid) içeren ürünler, kullanmdan önce daha az çalkalama gerektirir ve uzun süre saklandnda daha güçlü kalr. Stearik asit (stearic acid) doal m?

Stearik asit (stearic acid) doal kaynaklardan elde edildiinden ve endüstriyel ortamlarda üretilmediinden, bazen doal cilt bakmnda kimyasal bileenlere alternatif olarak kullanlmaktadr. Çounlukla içerik, etlerin ilenmesi srasnda elde edilen yan ürünlerden, özellikle de domuz etinden elde edilir. Bu nedenle vegan kozmetikte ve cilt bakmnda çok sk kullanlmaz ancak; Bitkilerden elde edilen Stearik asit (stearic acid), hayvansz formüllerde kullanma uygundur. Stearik asit (stearic acid) kullanabilir miyim?

ABD Gda ve laç Dairesi, stearik asidin cilt bakm ürünlerinde snrl miktarlarda topikal kullanm için güvenli olduu sonucuna varmtr ve bu da hassas cilde sahip baz kiilerin içerii tolere edemeyebileceini göstermektedir. Stearik aside giri

Oktadekanoik asit CH3 (CH2) 16COOH’nin baka bir ad olan Stearik asit (stearic acid), en yaygn ya asitlerinden biridir. Çou hayvansal ve bitkisel yada bir gliserol ester olarak bulunur (Beare-Rogers, Dieffenbacher ve Holm, 2001). Stearik asit (stearic acid), hayvansal yada (% 30’a kadar) bitkisel yadan (tipik olarak <% 5) daha fazladr. Önemli istisnalar, Stearik asit (stearic acid) içeriinin (trigliserid olarak)% 28-45 olduu kakao ya ve shea yadr. Dier uzun zincirli doymu ya asitlerinin aksine, stearik asidin erkeklerde veya kadnlarda lipoprotein kolesterol konsantrasyonlar üzerinde hiçbir etkisi yoktur (Yu, Derr, Etherton, & Kris-Etherton, 1995). Kelly ve ark. (2001) diyetteki stearik asidin (19 g / gün) erkeklerde trombojenik ve aterojenik risk faktörleri üzerinde olumlu etkilere sahip olduunu; yazarlar gda endüstrisinin gdalar palmitik asit ve trans ya asitleri yerine Stearik asit (stearic acid)le zenginletirmeyi düünmesini önermektedir. Bu nedenle, Stearik asit (stearic acid) toksik deildir ve insan vücuduyla biyolojik olarak uyumludur. Metal katyonlarla balanabilen polar bir kafa grubu ve organik çözücülerde çözünürlük salayan polar olmayan bir zincir ile Stearik asit (stearic acid), ampuanlar ve tra kremi ürünleri gibi deterjan, sabun ve kozmetiklerin üretiminde yaygn olarak kullanlmaktadr. (CH2) 16CO2H)

Stearik asit (stearic acid), özel koullarda yüzeyde birikebilen doymu bir ya asididir. Bu asit suda çözünmez ve etanolde çözünür. Bakr substrat temizlenmeli, paklanmal ve oksit giderimi için% 10 hacim HNO3 ile slatlmaldr. Temiz numune etanolik Stearik asit (stearic acid) solüsyonuna (0.01 M) batrlmal ve 30 V DC uygulanmaldr. Anot ve katot bakrdan yaplmaldr. X n toz difraktometresinin (XRD) zirvelerinin incelenmesi, stearik asidin bakr ile reaksiyonundan kaynaklanan bakr stearat bileenlerinin varln kantlamaktadr. Ortaya çkan bileen SEM kullanlarak incelenmitir (ekil 20). Bu bileenler, gerekli pürüzlülüü ve düük hidrofobi enerjisini salar, böylece temas açs 153 ° ‘ye ular ve böylece temas açsnn histerezisi azalr. Dier aratrmaclar Stearik asit (stearic acid) kullanarak gözenekli alümina üzerinde kendiliinden birleen bir katman oluturdular.28 Bu yöntem, etanol içinde 0.01 hacim Stearik asit (stearic acid) çözeltisi içinde anotlanm alüminyum üzerinde 30 dakika süreyle herhangi bir potansiyel uygulanmadan gerçekletirildi ve süperhidrofobi saland.

Normalde 1 ila 2 phr olan stearik asidin birincil ilevi, hzlandrc kompleks oluturma için reaktif bir çinko formu salamak için çinko oksit ile reaksiyona girmesidir. Daha yüksek konsantrasyonlar (8 phr) viskozite, histerezis ve yanma güvenliinde küçük düüler salar. 70 ° C suda ime, SBR 1502 ve 1509’da (ancak 1500 deil) 8 phr düzeyinde% 15’ten% 8’e önemli ölçüde düürülmütür. Magnezya-çinko ile aktive edilmi bir sistemde, 6 phr’de artan Stearik asit (stearic acid), azaltlm gerilme haricinde etkisizdi. Stearik asit (stearic acid) 100 ml 1-propanol içinde çözüldü. 3.1 ml su ilave edildikten sonra çözelti, 30 dakika kartrld. Son olarak 13.7 gr alüminyum sek-butoksit ilave edildi ve reaksiyon karm 20 dakika kartrld. Hazrlanan jel, statik koullar altnda 100 ° C’de 50 saat yalandrld. Soutulduktan, süzüldükten ve etanol ile ykandktan sonra kat ürün gece boyunca 50 ° C’de kurutuldu. Kalsinasyon, 410 ° C’de bir nitrojen ak içinde ve ardndan 420 ° C’de Stearik asit (stearic acid)’te havada gerçekletirildi.

Stearik asit (stearic acid), 18 karbon zinciri uzunluuna sahip doymu bir monobazik asittir. Hayvansal yan hidrolizi ile veya pamuk tohumu veya bitkisel yan hidrojenlenmesiyle sentezlenir. Ticari Stearik asit (stearic acid), Stearik asit (stearic acid) ile palmitik ve miristik asitin bir karmdr. Stearik ile palmitik asidin oranna bal olarak, makrokristalinden (45:55 w / w) mikrokristaline (50:50 ve 90:10 w / w) yapya kadar deiebilir (Li ve Wu, 2014). Stearik asit (stearic acid) polimorfik formlar A, B ve C (en kararl), farkl organik çözücüler ve kristalizasyon koullar kullanlarak yaplr (Garti, Wellner ve Sarig, 1980). Termal çalmalar, farkl tedarikçilerden alnan stearik asidin çok az partiden partiye veya üreticiden üreticiye deikenlik gösterdiini gösterdi (Garti ve dierleri, 1980; Inaoka, Kobayashi, Okada ve Sato, 1988).

Daha düük yüzey alan nedeniyle Stearik asit (stearic acid)% 1 -% 3 w / w konsantrasyonunda kullanlr. Arlkça% 0.25’lik bir konsantrasyondaki magnezyum stearatn, önceden jelatinletirilmi niasta ile yaplan tabletleri yumuatt ve tablet mukavemetini ve çözünmesini potansiyel olarak etkiledii bildirildiinden, Stearik asit (stearic acid), önceden jelatinize edilmi niasta için tercih edilen yalaycdr. Niasta, tabletleme srasnda plastik deformasyona urar ve bu nedenle magnezyum stearat konsantrasyonuna kar daha yüksek bir duyarlla sahiptir. Ayrca Fouda ve arkadalarnn bildirdii gibi, magnezyum stearat aspirinin bozunmasn hzlandrmasna ramen, Stearik asit (stearic acid) ilaçlar (aspirin) bozulmaya kar koruyabilir (Fouda, Mady ve El-Azab, 1998). Buna ek olarak, Stearik asit (stearic acid) ayrca ilaçlarn polimorfik faz dönüümünde rol oynayabilir ve bu da daha sonra tabletlerin çözünmesinin yavalamasna neden olur (Wang, Davidovich, vd., 2010). Stearik asit (stearic acid) ile kolaylatrlan ilacn polimorfik formlarnn (Form II’den Form I’e) dönüümü nedeniyle tablet çözünmesi yavat (Wang, Davidovich, vd., 2010). Stearik asit (stearic acid), tipik bir ya asidi örneidir. bir ucunda bir karboksil grubu ve dier ucunda bir metil grubu içeren esasen uzun hidrokarbon zincirleridir. Zincir uzunluklar 3 (propiyonik asit) ila 24 (lignoserik asit) arasnda deiebilir, ancak hidrojene bitkisel veya hayvansal yalarda bulunan ya asitlerinin çou yaklak C16-C20 uzunluundadr. Stearik asit (stearic acid), komu karbon atomlar arasnda çift ba olmad için doymu bir asittir. Bu, hidrokarbon zincirinin esnek olduu ve bir top eklinde yuvarlanabilecei veya uzun bir zig-zag haline getirilebilecei anlamna gelir.

nek yann buharla ilenmesi ile elde edilen yalarn karm olan donyandan ekstraksiyon ile yaplr. çya, sodyum hidroksit ile stldktan sonra sodyum stearat veren tristearin (bir gliserol molekülüne birletirilmi sadece 3 Stearik asit (stearic acid) molekülüdür, ekilde mavi ile gösterilmitir) içerir.

Stearik asit (stearic acid)

TCC’nin Oktadekanoik Asit olarak da adlandrlan Stearik asit (stearic acid), en yaygn uzun zincirli ya asitlerinden biridir. Doal hayvansal ve bitkisel yalarda kombine halde bulunur. Ticari Stearik asit (stearic acid), yaklak olarak eit miktarda stearik ve palmitik asit ile az miktarda oleik asitin karmdr. Mum, kozmetik, tra sabunu, kayganlatrc ve ilaç yapmnda kullanlr.

Uygulamalar

TCC’nin Stearik Asidi esas olarak deterjan, sabun ve ampuanlar ve tra kremi ürünleri gibi kozmetiklerin üretiminde kullanlmaktadr. Stearik asit (stearic acid), tekstil hallamada yumuatclar hazrlamak için hint ya ile birlikte kullanlr.

Ucuza bulunabilen ve kimyasal olarak iyi huylu olan Stearik asit (stearic acid), birçok ni uygulama alan bulur. Mum imalatnda ve basit eker ve msr urubu ile kartrldnda ekerlemelerde sertletirici olarak kullanlr. Ayn zamanda diyet takviyeleri üretmek için de kullanlr.

Havai fieklerde Stearik asit (stearic acid) genellikle alüminyum ve demir gibi metal tozlar kaplamak için kullanlr. Bu, oksidasyonu önler ve bileimlerin daha uzun süre saklanmasna izin verir.

Stearik asit (stearic acid), seramik tozlarn enjeksiyonla kalplanmas ve preslenmesi srasnda yaygn olarak kullanlan bir yalaycdr. Ta kalplarda piirilen köpük lateks için kalp ayrc olarak da kullanlr.

ta kalplarda piirilir.

Stearik asit (stearic acid) (IUPAC sistematik ad: oktadekanoik asit), birçok hayvansal ve bitkisel kat ve sv yalardan gelen yararl doymu ya asitleri türlerinden biridir. Mumsu bir katdr.

STEARK AST NEDR

Stearik asit (stearic acid) – C18H36O2, C17H35CO2H veya CH3 (CH2) 16COOH moleküler formülü ve CAS Numaras 57-11-4 ile – uzun karbon zincirine sahip en yararl ya asitlerinden biridir. Tercih edilen IUPAC snflandrmasna göre oktadekanoik asit olarak da anlan Stearik asit (stearic acid), adn Yunanca donya anlamna gelen kelimeden alr.

çerik, arlkl olarak hayvansal yadan elde edilen trigliseritlerden yaplr. Oda scaklnda saklanabilir ve sklkla sabun ve mum yapmnda kullanlr. Stearik asit (stearic acid), çounlukla, sv bir alkali ile birlikte s eklenmesi yoluyla kat ve sv yalar alkole ve sabunlara dönütüren sabunlatrma ilemiyle üretilir. Sabunlatrma tipik olarak hayvansal yalar ve bitkisel yalar üzerinde gerçekletirilir. STEARK AST ÇN BR TCAR KULLANIMLAR

Birçok ticari kullanmyla Stearik asit (stearic acid), birçok sektörde sürekli talep görmektedir. Gdaya uygun katk maddeleri ve bileenler tedarikçiyseniz, Brenntag North America gibi bir Stearik asit (stearic acid) distribütörüne ihtiyacnz vardr. ISO standartlarna ve HACCP gda güvenlii yönetmeliklerine tam uyumlu, uzmanlam küresel datm deneyimi ve tesisleri ile STEARK AST ORTAK KULLANILAN ENDÜSTRLER

Stearik asit (stearic acid), doas gerei iki ilevlidir. Polar olmayan zinciri organik çözücülerin çözünmesine izin verir. Art, kutupsal ba grubu, pozitif yüklü metal iyonlarna balanabilir. Sonuç olarak, ticari kullanmlar birkaç kategoriye ayrlr. Gda endüstrisinde, bir gda katk maddesi olarak, örnein tereyana yaklaan yapay bir tat vermek için baz süt ürünlerinde bir tatlandrc madde olarak kullanlr. Ek olarak, sakz, yenilebilir mumlar ve dier ekerlenmi kaplamalarda anahtar bileen olarak kullanlan oldukça faydal bir balama maddesidir. Bu bileenin gda snf, stearik asidin kat bileenleri birbirine balamak için tabletlerde bir katk maddesi olarak kullanld farmasötik endüstrisinde de kullanlr. Bu ekilde tabletler ielerde saklanrken parçalanmaz. Ayrca Stearik asit (stearic acid) ilavesiyle tabletler aktif bileenlerini ancak insan midesinde bulunan asitlere ulatktan sonra salmaktadr. Hem kiisel bakm hem de ev ürünleri endüstrisi, çeitli deterjanlar, sabunlar ve kozmetikler üretmek için stearik aside güvenir. Örnein ampuanlar, tra kremleri ve sabunlar inci görünümlerini Stearik asit (stearic acid) esterlerinden alr. Ek olarak, ya asidi yalayc olarak kullanlr – örnein lityum stearat, gresin ana bileenlerinden biridir. Ayrca, PVC’nin yumuatlmasndan otomotiv lastiklerinin imalatna kadar çeitli imalat süreçlerinde yumuatc olarak kullanlr. Uygun maliyetli ve iyi huylu bir katk maddesi olarak stearik asidin birçok ni kullanm vardr. Havai fiek yapmnda demir ve alüminyumu kaplamak için kullanlr. Kurun asitli akülerin üretiminde de kullanlmaktadr. Msr urubu veya eker ile birlikte mum yapmnda sertletirici olarak kullanlr. Ayrca, ta kalplardan köpük lateksin salnmasndan enjeksiyon kalplarnda kullanlan seramik tozlarnn yalanmasna kadar çeitli kalplama ve döküm ilemlerinde yalama ve ayrma maddesi olarak kullanlr … STEARK AST ÇN KMYASAL ÖZELLK BLGLER

Palmitik asitten sonra, Stearik asit (stearic acid), en doal olarak oluan doymu ya asitlerinden biridir. Suda hemen hemen çözünmeyen mumsu, renksiz bir katdr. Esterleri ve tuzlar stearatlar olarak adlandrlr ve trigliserit stearin moleküllerinin üçünden üretilir.

Stearik asit (stearic acid) (/ ˈstɪərɪk / STEER-ik, / stiˈærɪk / stee-ARR-ik), 18 karbonlu zincirli doymu bir ya asididir. IUPAC ad oktadekanoik asittir. Mumsu bir katdr ve kimyasal formülü C17H35CO2H’dir. Ad, donya anlamna gelen Yunanca στέαρ “stéar” kelimesinden gelmektedir. Stearik asit (stearic acid)in tuzlar ve esterleri stearatlar olarak adlandrlr. Stearik asit (stearic acid), esteri olarak palmitik asitten sonra doada bulunan en yaygn doymu ya asitlerinden biridir. [10] Üç molekül Stearik asit (stearic acid)ten türetilen trigliseride stearin denir.

Stearik asit (stearic acid) üretimi

Stearik asit (stearic acid), trigliseritlerin scak su (yaklak 100 ° C) kullanlarak sabunlatrlmasyla kat ve sv yalardan elde edilir. Elde edilen karm daha sonra damtlr. [11] Ticari Stearik asit (stearic acid), saflatrlm Stearik asit (stearic acid) bulunmasna ramen, genellikle stearik ve palmitik asitlerin bir karmdr.

Stearik asit (stearic acid) açsndan zengin kat ve sv yalar, hayvansal yada (% 30’a kadar) bitkisel yaa (tipik olarak <% 5) göre daha fazladr. Önemli istisnalar, Stearik asit (stearic acid) içeriinin (trigliserit olarak)% 28-45 olduu yiyecekler kakao ya (% 34) [12] ve shea yadr. [13]

Biyosentezi açsndan Stearik asit (stearic acid), asetil-CoA’nn iki karbonlu yap talarna katkda bulunduu ya asidi sentezi makinesi araclyla karbonhidratlardan üretilir.

Stearik asit (stearic acid)in Kullanm Alanlar

Genel olarak, Stearik asit (stearic acid) uygulamalar, metal katyonlara balanabilen bir polar ba grubu ve organik çözücüler içinde çözünürlük salayan polar olmayan bir zincir ile iki ilevli karakterini kullanr. Kombinasyon, bir yüzey aktif madde ve yumuatc madde olarak kullanmlara yol açar. Stearik asit (stearic acid), tipik doymu karboksilik asit reaksiyonlarna maruz kalr; bunlardan en önemlisi, stearil alkole indirgeme ve çeitli alkollerle esterletirmedir. Bu, basitten karmak elektronik cihazlara kadar geni bir imalat yelpazesinde kullanlmaktadr.

Gda katk maddesi olarak

Baz gdalarda Stearik asit (stearic acid) (E numaras E570) bulunur. [14]

Sabunlar, kozmetikler, deterjanlar

Stearik asit (stearic acid) esas olarak deterjan, sabun ve ampuan ve tra kremi gibi kozmetiklerin üretiminde kullanlmaktadr. Sabunlar dorudan Stearik asit (stearic acid)ten deil, dolayl olarak Stearik asit (stearic acid) esterlerden oluan trigliseritlerin sabunlatrlmasyla yaplr. Etilen glikol, glikol stearat ve glikol distearat ile Stearik asit (stearic acid) esterleri, ampuanlar, sabunlar ve dier kozmetik ürünlerde inci gibi bir etki yaratmak için kullanlr. Ürüne erimi halde eklenirler ve kontrollü koullar altnda kristallemelerine izin verilir. Deterjanlar, amidlerden ve stearik asidin kuaterner alkilamonyum türevlerinden elde edilir.

Yalayclar, yumuatclar ve ayrclar

Sabunun ana bileeni olan sodyum tuzunun yumuak dokusu göz önüne alndnda, dier tuzlar da yalama özellikleri açsndan yararldr. Lityum stearat, gresin önemli bir bileenidir. PVC’yi yumuatmak için çinko, kalsiyum, kadmiyum ve kurunun stearat tuzlar kullanlr. Stearik asit (stearic acid), tekstil hallamada yumuatclar hazrlamak için hint ya ile birlikte kullanlr. Istlr ve kostik potas veya kostik soda ile kartrlr. lgili tuzlar da yaygn olarak salm ajanlar olarak kullanlr, ör. otomobil lastii üretiminde. Örnek olarak, bir alç parça kalptan veya atk kalptan döküm yapmak ve orijinal kabuklu bir kilden bir kalp yapmak için kullanlabilir. Bu kullanmda toz Stearik asit (stearic acid) su ile kartrlr ve süspansiyon dökümden sonra ayrlacak yüzeye frçalanr. Bu, svadaki kalsiyum ile reaksiyona girerek bir ayrc ajan olarak ilev gören ince bir kalsiyum stearat tabakas oluturur. [15]

Çinko ile reaksiyona girdiinde, fanlama srasnda düzgün bir hareket salamak için kart oynamak için bir yalayc (fan tozu) olarak kullanlan çinko stearat oluturur. Stearik asit (stearic acid), enjeksiyon kalplama ve seramik tozlarn preslenmesi srasnda yaygn olarak kullanlan bir yalaycdr. [16] Ta kalplarda piirilen köpük lateks için kalp ayrc olarak da kullanlr.

Ni kullanmlar

Ucuz, toksik olmayan ve oldukça inert olan Stearik asit (stearic acid), birçok ni uygulama bulur. [11] Stearik asit (stearic acid), kurun-asit pillerin üretiminde negatif plaka katk maddesi olarak kullanlr. Hamur hazrlanrken 1 kg oksit bana 0,6 g orannda eklenir. Negatif plakann hidrofobikliini özellikle kuru yükleme ilemi srasnda arttrdna inanlmaktadr. Ayrca, tank oluturma ileminden sonra plakalar açk atmosferde kurutulmak üzere tutulduunda, taze oluturulmu kurunun (negatif aktif malzeme) oksidasyonunun uzamasn da azaltr. Sonuç olarak, ilk doldurma ve arj (IFC) srasnda kuru arj edilmemi bir pilin arj süresi, Stearik asit (stearic acid) katk maddesi içermeyen plakalarla birletirilmi bir pile kyasla nispeten daha düüktür. Ya asitleri, mum yapmnn klasik bileenleridir. Stearik asit (stearic acid), ekerlerde sertletirici olarak basit eker veya msr urubu ile birlikte kullanlr. Havai fieklerde Stearik asit (stearic acid) genellikle alüminyum ve demir gibi metal tozlar kaplamak için kullanlr. Bu, oksidasyonu önler ve bileimlerin daha uzun süre saklanmasna izin verir.

Metabolizma

nsanlarda yaplan bir izotop etiketleme çalmas [17], oleik aside oksidatif olarak desatürasyon yapan diyet Stearik asit (stearic acid) fraksiyonunun, palmitoleik aside benzer ekilde dönütürülen palmitik asit fraksiyonundan 2.4 kat daha yüksek olduu sonucuna varmtr. Ayrca, stearik asidin kolesterol esterlerine dahil edilmesi daha az olasdr. Epidemiyolojik ve klinik çalmalarda, stearik asidin dier doymu ya asitlerine kyasla azalm LDL kolesterolü ile ilikili olduu bulunmutur. [18]

Tuzlar ve esterler

Stearatlar, Stearik asit (stearic acid)in tuzlar veya esterleridir. Stearik asidin elenik baz C17H35COO-, stearat anyonu olarak da bilinir.

Stearat veya 18: 0 olarak da bilinen Stearik asit (stearic acid), uzun zincirli ya asitleri olarak bilinen organik bileikler snfna aittir. Bunlar, 13 ile 21 arasnda karbon atomu içeren alifatik kuyruu olan ya asitleridir. Stearik asit (stearic acid) kat halde bulunur ve pratik olarak çözünmez (suda) ve nispeten nötr olarak kabul edilir. Stearik asit (stearic acid), çou insan dokusunda bulunmutur ve ayrca kan, idrar, ter ve tükürük dahil olmak üzere çou biyo svda tespit edilmitir. Hücre içinde, Stearik asit (stearic acid) esas olarak sitoplazma, zarda (logP’den tahmin edilir), miyelin klfnda ve adipozomda bulunur. Stearik asit (stearic acid), mayadan insanlara kadar tüm ökaryotlarda bulunur. Stearik asit (stearic acid), bir dizi enzimatik reaksiyona katlr. Özellikle, Dhap (18: 0E) ve Stearik asit (stearic acid), dhap (18: 0) ve oktadekanolden biyosentezlenebilir; dihidroksiaseton fosfat açiltransferaz ve alkildihidroksiasetonfosfat sentaz enzimi tarafndan katalize edilir. Ek olarak, Stearik asit (stearic acid), asil-CoA tioesteraz enzimi ile etkileimi yoluyla stearoil-CoA’dan biyosentezlenebilir. nsanlarda Stearik asit (stearic acid), plazmalojen sentez yolunda rol oynar. Stearik asit (stearic acid) ayrca uzun zincirli doymu ya asitleri yolunun mitokondriyal Beta oksidasyonu ad verilen metabolik bozuklukta da rol oynar. nsan vücudunun dnda Stearik asit (stearic acid), lahana, demirhindi, ekmek fst aac tohumu ve ceviz gibi bir dizi gda maddesinde bulunabilir. Bu, stearik asidi bu gda ürünlerinin tüketimi için potansiyel bir biyobelirteç yapar. Stearik asit (stearic acid), potansiyel olarak toksik bir bileiktir.

Hayvan hücreleri, palmitik ve stearik ya asidi ve bunlarn n-9 türevlerini de novo sentezleyebilir. Ancak de novo sentez, enerjinin kullanlmasn gerektirir. Palmitik asit (C16), stearik asidin (C18) hemen öncüsüdür. Hayvan hücrelerinde oleik asit, stearik asidin dehidrojenasyonu (desatürasyonu) ile oluturulur. Oleik asit daha da uzatlr ve bir n-9 ya asitleri ailesine desatüre edilir. N-9 ya asitlerini sentezlemek için kullanlan enerji talebi, palmitik ve Stearik asit (stearic acid)ler salanarak hücre kültüründe azaltlabilir. Ayrca palmitik ve Stearik asit (stearic acid) doymu olduundan hücrelere verme srasnda peroksidize olmazlar.

Korneum lipidlerinin önemli bir bileeni olan Stearik asit (stearic acid) ile hafif nemlendirici vücut ykamas ve yumuatc soya fasulyesi ya piyasaya sürüldü. Bu çalmann amaçlar, formülasyonla in vivo temizlemeden sonra korneumdaki Stearik asit (stearic acid) miktarn ve yerini belirlemektir. Soya fasulyesi ya veya petrol jeli (PJ) içeren formülasyonla bir ve be ardk gün boyunca klinik temizlik çalmalar gerçekletirildi. çindeki serbest Stearik asit (stearic acid), tamamen döteryumlanm varyantla deitirildi. 10 ardk korneum bant eridindeki Stearik asit (stearic acid) miktarlar, sv kromatograf-kütle spektroskopisi ile ölçüldü. Ayr olarak, elektron paramanyetik rezonans (EPR) ölçümleri, soya fasulyesi ya formülasyonu ile serbest ya asidi, spin probu analou 5-doksil Stearik asit (stearic acid) ile deitirilmi bir ykamadan sonra domuz derisi ile alnmtr. Döteryumlanm Stearik asit (stearic acid), 10 ardk stratum corneum tabakasnn tamamnda tespit edildi ve soya fasulyesi ya formülasyonu ile be ykamadan sonra toplam miktar 0.33 ug / cm2 idi.

Beta oksidasyon, omega-oksidasyon ve (omega-1) oksidasyon yoluyla Stearik asit (stearic acid) metabolizmas sçan karacierinde gösterilmitir. Palmitik asit üretmek için tek bir asetat ksmnn çkarlmas meydana gelebilir ve hem bu hem de Stearik asit (stearic acid), srasyla oleik ve palmitoleik asitler üreterek desatüre olabilir. (14) C Stearik asit (stearic acid) sçanlara enjekte edildikten sonra, karacier (14) C’nin yaklak yüzde 50’si oleik asit olarak geri kazanld, bu da ar desatürasyonun meydana geldiini gösteriyor. Desatürasyon, ekstrahepatik olarak yalnzca küçük bir ölçüde oluur, ancak ya dokusu ve meme dokusu hücrelerinde tespit edilmitir. Stearik asit (stearic acid) ayrca fosfolipidler, di- ve trigliseritler, kolesterol, kolesterol esterleri ve dier sterol esterlere dahil edilir.

Stearik asit (stearic acid), renksiz, mumsu bir kat veya beyazdan sarya toz veya kristallerdir. çya kokusu ve tad vardr. Suda düük çözünürlüe sahiptir. Stearik asit (stearic acid), birçok bitkisel ve hayvansal yada doal olarak bulunur. KULLANIM: Stearik asit (stearic acid), önemli bir ticari kimyasaldr. laç, kozmetik, sabun, fonograf kaytlar, izolatörler, mumlar, gda ambalajlar, modelleme bileikleri ve dier kimyasallarn yapmnda kullanlr. Baz pestisitlerde bulunan bir bileendir. MARUZ KALMA: Stearik asit (stearic acid) kullanan içiler sislerde nefes alabilir veya dorudan ciltle temas edebilir. Genel popülasyon kiisel bakm malzemeleri, sigara içilmesi, havann solunmas ve yiyecek ve içme suyu tüketimi ile deri temas yoluyla maruz kalabilir. Stearik asit (stearic acid) ortama salnrsa havada parçalanacaktr. Havaya salnan Stearik asit (stearic acid), sonunda yere düen parçacklarn içinde veya üzerinde olacaktr. Güne ndan parçalanmas beklenmez. Nemli toprak ve su yüzeylerinden havaya karmaz. Toprakta hareket etmesi beklenmez. Mikroorganizmalar tarafndan parçalanr ve balklarda birikmesi beklenmez. RSK: Stearik asit (stearic acid), tüketici ürünlerinde bulunan seviyelerde Genel Olarak Güvenli Olarak Kabul Edilen (GRAS) bir kimyasaldr. Seyreltilmi Stearik asit (stearic acid) veya Stearik asit (stearic acid) içeren kozmetiklerin cilde uygulanmasnn ardndan baz kiilerde minimal cilt tahrii bildirilmitir. Tekrarlanan cilt uygulamalarn takiben herhangi bir alerjik cilt reaksiyonu kant gözlenmemitir. Kan kolesterol metabolizmas, kan phtlama hz ve kan ekeri seviyeleri diyetteki Stearik asit (stearic acid) miktarndan etkilenebilir, ancak mevcut veriler kesin deildir. Stearik asit (stearic acid) içeren bir kozmetik formülasyonun tekrar tekrar cilt uygulamasndan sonra laboratuar hayvanlarnda deien kan parametreleri gözlendi. Diyetlerinde orta düzeyde Stearik asit (stearic acid)le beslenen laboratuvar hayvanlarnda zamanla kan phtlamasnda azalma, kolesterol seviyelerinde art ve kilo almnda azalma gözlenmitir. Ar yüksek dozlarda kalp düzensizlikleri, kas spazmlar, felç, itahszlk, iddetli akcier enfeksiyonlar ve ölüm bildirildi. Yiyecek veya enjeksiyon yoluyla maruziyetten sonra tümör gelimedi. Laboratuvar hayvanlarnda stearik asidin ksrla, düük veya doum kusurlarna neden olma potansiyeline ilikin veriler mevcut deildi. Stearik asidin insanlarda kansere neden olma potansiyeli ABD EPA IRIS program, Uluslararas Kanser Aratrma Ajans veya ABD Ulusal Toksikoloji Program 14. Karsinojen Raporunda deerlendirilmemitir.

Ortalama Stearik asit (stearic acid) konsantrasyonu ile ayrt edilen / üç tip Stearik asit (stearic acid) vardr. Bu Stearik asit (stearic acid)ler% 37,5,% 42,5 ve% 95,0 minimum Stearik art Palmitik Asit konsantrasyonlar srasyla% 89,0,% 94,0 ve% 97,5’tir. Normal farmasötik snf Stearik asit (stearic acid), minimum% 40,0 Stearik veya Palmitik Asit ve bunlarn toplam için minimum% 90,0 belirtir. Saflatrlm farmasötik snf Stearik asit (stearic acid), toplam için minimum% 90,0 Stearik asit (stearic acid) içerii ve minimum% 96,0 belirtir.

Stearik asit (stearic acid), hayvan hücre kültüründe kullanlr. NSAN ÇALIMALARI: Büyük miktarlarda Stearik asit (stearic acid) yutulmasndan kaynaklanan en büyük tehlike barsak tkankldr. Cilt hassasiyeti olaanddr. Stearik asidin aspirasyonu veya solunmas kimyasal pnömoniye neden olabilir. Stearik asidin implantasyonu yabanc cisim reaksiyonuna neden olur. HAYVAN ÇALIMALARI: 15 g / kg’lk dozlarda 10 farelik gruplara sonda ile uygulanan% 2.8 Stearik asit (stearic acid) içeren cilt losyonu formülasyonlar 1 ölümle sonuçland. Normal davran ve görünüm gözlendi ve hayatta kalan sçanlarda büyük bir deiiklik olmad. Ticari snf Stearik asit (stearic acid) ile 6 tavanda hiçbir oküler iritasyon üretilmezken, ticari snf üçlü preslenmi Stearik asit (stearic acid) ile 6 tavann 3’ünde hafif konjunktival eritem üretilmitir. Msr yanda% 35 Stearik asit (stearic acid) ve vazelin içinde% 50 Stearik asit (stearic acid) ile muamele, esas olarak 2 gün içinde azalm olan hafif konjunktival eritem üretiyordu. Yüksek dozlarda stearik asidin intravenöz infüzyonu, sçanlarda, tavanlarda ve köpeklerde trombojenikti ve kan trombosit kümelenmesine ve akut kalp yetmezliine neden oldu. Sütten kesilen farelere% 5 ila% 50 Stearik asit (stearic acid) (monogliserit olarak) içeren diyetler 3 hafta süreyle verildiinde,% 10 diyet seviyesinin üzerinde kilo alma depresyonu görüldü. Ölüm sadece% 50 diyetle gerçekleti. Etkiler yetikin farelerde daha az farkedildi. 6 hafta boyunca yüksek yal bir diyetin parças olarak% 5 Stearik asit (stearic acid) veya 9 hafta boyunca% 6 Stearik asit (stearic acid)le beslenen sçanlar, kan phtlama süresinde azalma ve hiperlipemi gösterdi. 24 hafta boyunca 50 g / kg / gün Stearik asit (stearic acid) ile beslenen sçanlar, ya dokusunda tersine çevrilebilir lipogranülomlar gelitirdi. Yaklak 30 hafta boyunca azdan 3000 ppm Stearik asit (stearic acid) ile beslenen sçanlarda hiçbir önemli patolojik lezyon gözlenmemitir, ancak itahszlk, artan ölüm oran ve daha büyük bir pulmoner enfeksiyon insidans gözlenmitir. Farelerde yaklak 15 ila 500 mg / kg arasnda deien tek intraperitoneal Stearik asit (stearic acid) dozlar ölüme neden olmad, ancak en yüksek doz düzeyinde vücut arlnda bir kayba neden oldu. Kedilerde, düük Stearik asit (stearic acid) dozlar, yüksek pulmoner üretti ancak sistemik kan basncn düürdü. 5 mg’n üzerindeki dozlar apneye, kan basncnda düüe ve ölüme yol açan konvülsiyonlara neden oldu. Stearik asit (stearic acid), Salmonella typhimurium sular TA98, TA100, TA1535, TA1537 ve TA1538 ile Ames testi kullanlarak mutajenite açsndan test edilmitir. Stearik asit (stearic acid), metabolik aktivasyonla ve metabolik aktivasyon olmadan test edilen sularda arka planda mutajenik aktiviteye sahip deildi.

Stearik asit (stearic acid), faktör XII’nin aktivasyonu ve kan trombositlerinin toplanmas yoluyla kann hiper phtlamasna neden olur. Balanmam stearik asidin (sodyum tuzu) köpeklerin sistemik dolamna enjekte edilmesini, büyük genel tromboz ve ani ölüm izledi. Faktör XII’de eksik olan kulara benzer infüzyonlar, hiper phtlama veya tromboza neden olmad. Uzun zincirli doymu ya asitlerinin etkileri, stearik asidi <2’lik bir serbest ya asidi (FFA) ile albümine molar orannda balamak için albümin kullanlarak önlenebilir. Asl sorun, Stearik asit (stearic acid) açsndan zengin yiyeceklerin yenip yenemeyeceidir. trombojenik bir etkiye neden olur.

Etilen oksit içinde% 65 Stearik asit (stearic acid) içeren bir preparat, 6 NZW tavann derisindeki bozulmam ve anm bölgelere uygulamadan 24 ve 72 saat sonra eritem ve minimal ödem üretti. Bu tek hakaret kapal yama testi (SIOPT) için PII 3,00 idi. 6 albino tavann salam ve anm derisinin “dier ya asitleri” ile kombinasyon halinde% 45 ve 59 stearik aside 4 saatlik maruziyetini içeren tek hakaret oklüzif yama testi SIOPT çalmalarnda hiçbir tahri gözlenmedi. 9 albino tavann derisinin suda% 35 Stearik Aside ve vazelin içindeki% 50 stearik aside iki saatlik maruz kalmas, ilgili PII’lerin 0.33 ve 0.56 olmasna neden oldu. Her iki SIOPT çalmasnda da geçici hafif eritem ve ödem gözlenmedi.

Stearik asit (stearic acid)in, özellikle stearatlar ve stearat kurutucular, yalayclar ve sabunlar olmak üzere kimyasallarn imalatnda, ilaç ve kozmetikte, hzlandrc aktivatör olarak, kauçuk bileiklerinde dispersiyon ajan ve yumuatc olarak, ayakkab ve metal cilalarnda, kaplamalarda üretimi ve kullanm, gda ambalajlar, fitiller ve merhemler, çeitli atk aklar yoluyla çevreye salnmasna neden olabilir. Pestisitlerde inert bir bileen olarak kullanlmas, dorudan çevreye salnmasna neden olabilir. Stearik asit (stearic acid), tamamen doymu bir ya asididir ve donya ve dier hayvansal kat ve sv yalarn yan sra baz bitkisel yalarda bir gliserit olarak bulunur. Ya asitleri memelilerin, kularn ve omurgaszlarn normal günlük diyetinin önemli bir parçasdr. Stearik asit (stearic acid), pamuk, hindistancevizi, palmiye çekirdei, msr, hurma, hint, kolza tohumu, soya fasulyesi, ayçiçei, ringa bal ve donya yalarnda ve çeitli pirinçlerde düük oranlarda bulunur. Havaya braklrsa, 25 ° C’de 7,2X10-7 mm Hg’lik tahmini bir buhar basnc, stearik asidin atmosferdeki hem buhar hem de partikül fazlarnda bulunacan gösterir. Buhar faz Stearik asit (stearic acid), atmosferde fotokimyasal olarak üretilen hidroksil radikalleri ile reaksiyona girerek bozunacaktr; Havadaki bu reaksiyonun yar ömrünün 17 saat olduu tahmin edilmektedir. Partikül fazl Stearik asit (stearic acid), slak ve kuru biriktirme yoluyla atmosferden uzaklatrlacaktr. Stearik asit (stearic acid),> 290 nm dalga boylarnda absorbe eden kromoforlar içermez ve bu nedenle, güne nda dorudan fotolize duyarl olmas beklenmez. Topraa salnrsa, tahmini Koc 5,1X10 + 4 deerine göre stearik asidin hareketliliine sahip olmamas beklenir. Stearik asidin tahmini pKa’s 4,75’tir, bu da bu bileiin çevrede neredeyse tamamen anyon formunda bulunacan ve anyonlarn genellikle organik karbon ve kil içeren topraklara nötr muadillerine göre daha güçlü adsorbe olmadklarn gösterir. Nemli toprak yüzeylerinden buharlamann önemli bir kader süreci olmas beklenmemektedir çünkü bileik bir anyon olarak mevcuttur ve anyonlar uçucu deildir. Stearik asidin, tahmini buhar basncna göre kuru toprak yüzeylerinden uçmas beklenmemektedir. Modifiye edilmi bir OECD tarama testinden yararlanarak, Stearik asit (stearic acid) teorik BO deerinin% 79’una 28 günde ulat ve bu da biyolojik bozunmann toprakta önemli bir kader süreci olduunu gösteriyor. Suya salnrsa, nötr Stearik asit (stearic acid) türlerinin tahmini Koc’a göre askda katlara ve tortulara adsorbe olmas beklenir. Stearik asit (stearic acid) anyonu olan stearatn, ortalama% 99 adsorpsiyona sahip deneysel çalmalara dayal olarak askda kat maddelere ve tortuya adsorbe olmas beklenmektedir. Aktif çamur kullanan% 43,9’luk 5 günlük teorik BO, biyolojik bozunmann suda önemli bir kader süreci olabileceini düündürmektedir. Tahmini pKa, stearik asidin neredeyse tamamen anyon formunda 5 ila 9 pH deerlerinde var olacan ve bu nedenle su yüzeylerinden buharlamann önemli bir kader süreci olmas beklenmediini gösterir. Tahmin edilen 10 BCF, suda yaayan organizmalardaki biyokonsantrasyon potansiyelinin düük olduunu göstermektedir. Bu bileik, çevresel koullar altnda hidrolize olan fonksiyonel gruplardan yoksun olduundan, hidrolizin önemli bir çevresel kader süreci olmas beklenmemektedir. Stearik aside mesleki maruziyet, stearik asidin üretildii veya kullanld iyerlerinde tozun solunmas ve bu bileikle dermal temas yoluyla meydana gelebilir. zleme verileri, genel popülasyonun, ortam havasnn ve tütün dumannn solunmas, yiyecek ve içme suyunun yutulmas ve bu bileik ve Stearik asit (stearic acid) içeren dier tüketici ürünleriyle deri temas yoluyla stearik aside maruz kalabileceini göstermektedir.

Stearik asit (stearic acid), konsantrasyonu bilinmeyen, Singapur’daki atk atklardan alnan giri ve çk gaz örneklerinin bir bileeni olarak tanmlanmtr (1). Stearik asit (stearic acid), parafin ve balmumundan mum dumannda 10.66 ve 1.85 mg / g organik bileiklerde bulundu (2). Krmz akçaaaç (3), krmz mee (3), beyaz hu (3), beyaz çam (3), baldran (3), balzam köknar (3), sar kavak (4), beyaz odun dumannda Stearik asit (stearic acid) bulunmutur. dibudak (4), tatl sakz (4), mockernut hickory (4), loblolly çam (4) ve kesik çam (4). Stearik asit (stearic acid) çam, mee ve sentetik tomruklardan çkan odun dumannda 4,31, 3,33 ve 2,33 mg / kg yanm odunlarda tespit edilmitir (5). Stearik asit (stearic acid), partikül faznda 4,32, 2,77 ve 1,95 mg / kg yanm odun olarak bulunmutur (6). Stearik asit (stearic acid), 570 ng / g’de çam odun yakan bir kamp ateinden elde edilen ekstrede bulundu (7). Stearik asit (stearic acid), 2 numaral distile fuel oil (8) yakan kazanlardan alnan ince aerosollerde bulunmutur. Almanya’da bir belediye atk yakma tesisinin emisyonlarnda Stearik asit (stearic acid) tespit edilmitir (9). Stearik asit (stearic acid), Iowa’daki Ames santralinde (10) kömürün yanmas srasnda 80 ng / cu m konsantrasyonda buhar ve 40-150 ng / g konsantrasyonlu partiküller üzerinde tanmlanmtr. Stearik asit (stearic acid), stlm çat katran pot dumanlarndan 823.4 ug / g’de bulundu (11). Stearik asit (stearic acid), srasyla 2,150 ve 96,000 ug / kg piirilmi ette ticari ölçekli et kömür kzartma ilemlerinden çkan gaz ve partikül madde atklarnda bulunmutur (12).

Katalizör olmayan otomobiller, katalizörlü otomobiller ve ar hizmet dizel kamyonlardan Stearik asit (stearic acid) için ince partikül aerosol emisyon oranlar srasyla 3,0, 18,0 ve 72,5 ug / km olarak belirlenmitir (1). Stearik asit (stearic acid), srasyla 6,009,0, 79,5 ve 689,0 ug / g partikül numunesi konsantrasyonlarnda lastik anma partiküllerinde, fren balatas partiküllerinde ve yol tozu partiküllerinde tespit edilmitir (2). Stearik asit (stearic acid), orta hizmet dizel kamyonlardan 362 ug / km’de yayld (3). Stearik asit (stearic acid), 210.2 ug / g konsantrasyonda yeil yapraklardan ve 200.9 ug / g konsantrasyonda ölü yapraklardan ince parçackl anma ürünlerinde bulunmutur; toplanan örnekler Los Angeles, CA bölgesinin karakteristik aaçlarndan alnmtr (4). Doalgazla çalan bir su stcs ve doalgazla çalan bir alan stcdan Stearik asit (stearic acid) için ince partikül emisyon oranlar belirlenmitir (5). Stearik asit (stearic acid) için bir HEPA filtreli seyreltme hava örnei emisyon orannn 2.6 pg / kJ olduu belirlendi; birinci filtreden Stearik asit (stearic acid) için emisyon oran 81.8 pg / kJ olarak belirlendi; yedek filtreden Stearik asit (stearic acid) için emisyon oran belirlenmemitir (5). Los Angeles’taki Van Nuys tünelindeki motorlu araçlardan Stearik asit (stearic acid) için emisyon oran, 21 Eylül 1993’te 302.9 mg / L benzine edeer yakt olarak yakld (6). Stearik asit (stearic acid), benzinle çalan motorlu tatlarn emisyonlarnda katalizör donanml motorlar ve katalizör olmayan motorlar için 4,32 ug / km ve 147 ug / km orannda ölçülmütür (7).

Finlandiya’nn orta kesimlerindeki 12 evden toplanan yerleik ev tozu örneklerinde Stearik asit (stearic acid) tespit edildi, miktar belirlenmedi (1). Stearik asit (stearic acid), ticari olarak temin edilebilen 10 kahve filtre kadnn 7’sinde tanmlanmtr (2). Stearik asit (stearic acid) yanmam parafin ve bal mumunda 25.56 ve 0.75 mg / g balmumunda bulunmutur (3). Kentsel yüzey ak, Mays 1985’ten Temmuz 1985’e kadar spanya, Madrid yaknlarndaki peyzajl, ticari ve endüstriyel birkaç yerleim bölgesinden örneklendi ve Stearik asit (stearic acid) içerdii bulundu (4). Stearik asit (stearic acid), tütün, tütün duman ve tütün duman ikamesinin bir bileeni olarak tanmlanmtr (5).

L’acide stéarique (STEARIC ACID)

L’acide stéarique (STEARIC ACID) est un acide gras saturé à longue chaîne avec un squelette à 18 atomes de carbone. L’acide stéarique (STEARIC ACID) se trouve dans diverses graisses animales et végétales et est un composant majeur du beurre de cacao et du beurre de karité.L’acide octadécanoïque est un acide gras saturé à chaîne droite C18 de nombreux lipides animaux et végétaux. En plus de l’alimentation, il est utilisé dans les savons durcissants, l’assouplissement des plastiques et dans la fabrication de cosmétiques, de bougies et de plastiques. Il a un rôle de métabolite végétal, de métabolite humain, de métabolite Daphnia magna et de métabolite algal. C’est un acide gras à longue chaîne, un acide gras saturé à chaîne droite et un acide gras saturé. C’est un acide conjugué d’un octadécanoate. Il dérive d’un hydrure d’un octadécane. L’acide stéarique (STEARIC ACID) est un solide blanc avec une légère odeur. Flotte sur l’eau Titres alternatifs: acide n-octadécanoïque, acide octadécanoïque

L’acide stéarique (STEARIC ACID), également appelé acide octadécanoïque, l’un des acides gras à longue chaîne les plus courants, se trouve sous forme combinée dans les graisses naturelles animales et végétales. L ‘«acide stéarique (STEARIC ACID)» commercial est un mélange de quantités approximativement égales d’acides stéarique et palmitique et de petites quantités d’acide oléique. Il est utilisé dans la fabrication de bougies, de cosmétiques, de savons à raser, de lubrifiants et de produits pharmaceutiques.

Formule développée de l’acide stéarique (STEARIC ACID).

Encyclopædia Britannica, Inc.

Dans la nature, l’acide stéarique (STEARIC ACID) se présente principalement sous forme de triglycéride mixte, ou graisse, avec d’autres acides à longue chaîne et sous forme d’ester d’un alcool gras. Il est beaucoup plus abondant dans la graisse animale que dans la graisse végétale; le saindoux et le suif contiennent souvent jusqu’à 30 pour cent d’acide stéarique (STEARIC ACID).

L’hydrolyse alcaline, ou saponification, des graisses donne des savons, qui sont les sels de sodium ou de potassium d’acides gras; l’acide stéarique (STEARIC ACID) pur est difficilement obtenu à partir d’un tel mélange par cristallisation, distillation sous vide ou chromatographie des acides ou des dérivés appropriés. L’acide pur subit des réactions chimiques typiques des acides carboxyliques. C’est un solide cireux incolore qui est presque insoluble dans l’eau.L’acide stéarique (STEARIC ACID) est un acide aminé très courant est utilisé dans la fabrication de plus de 3200 produits de soins de la peau et des cheveux vendus aux États-Unis. Sur les étiquettes des produits, il est parfois répertorié sous d’autres noms, notamment Century 1240, acide cétylacétique, Emersol 120, Emersol 132, Emersol 150, Formula 300 et Glycon DP.

Pour le Black Friday, vous pouvez obtenir 25% de réduction sur de nombreuses marques de soins de la peau professionnelles lorsque vous entrez le code CYBER à la caisse, pratique si vous recherchez des produits contenant de l’acide stéarique (STEARIC ACID).

Où trouve-t-on l’acide stéarique (STEARIC ACID)?

Dans la nature, l’acide stéarique (STEARIC ACID) se trouve dans les graisses et les huiles des plantes et des animaux. Les échantillons de graisse animale contiennent généralement 30% d’acide stéarique (STEARIC ACID). La plupart des huiles végétales reçoivent 5% de leur volume de l’acide aminé, à l’exception du beurre de cacao et du beurre de karité, qui contiennent jusqu’à neuf fois plus d’acide stéarique (STEARIC ACID). Comment l’acide stéarique (STEARIC ACID) est-il produit?

Pour isoler la substance, la graisse ou l’huile qui contient l’acide aminé est chauffée et pressurisée. Ensuite, le matériau est placé dans de l’eau bouillante à l’intérieur d’une machine de distillation. Cet appareil capte la vapeur dégagée en faisant bouillir les échantillons de graisse ou d’huile, puis la transporte à travers une série de serpentins réfrigérés. La chute soudaine de température provoque la condensation de l’acide stéarique (STEARIC ACID) et devient un liquide. Il peut ensuite être refroidi davantage pour produire une substance solide cireuse. Dans quoi l’acide stéarique (STEARIC ACID) est-il utilisé?

L’une des principales utilisations de l’acide stéarique (STEARIC ACID) est la production de savons. Lorsqu’il est ajouté à ces produits, l’acide aminé aide à épaissir et à durcir les autres ingrédients pour former une barre solide. L’acide stéarique (STEARIC ACID) possède également des propriétés nettoyantes importantes qui le rendent utile dans les savons. L’ingrédient agit comme un surfactant, une substance qui abaisse la tension superficielle des huiles. Les huiles ont une tension superficielle plus élevée que l’eau ordinaire, c’est pourquoi les gouttelettes d’eau ne se mélangent pas facilement aux huiles. En abaissant la tension superficielle de l’huile, l’acide stéarique (STEARIC ACID) permet à l’eau de se combiner avec les molécules d’huile et de les laver. En conséquence, l’acide stéarique (STEARIC ACID) aide à éliminer la saleté, la sueur et l’excès de sébum de la peau et des cheveux. Cela en fait un ingrédient utile dans les nettoyants, les nettoyants pour le corps et les shampooings ainsi que les savons en pain.Pourquoi l’acide stéarique (STEARIC ACID) est-il présent dans tant de produits?

Parce que l’acide stéarique (STEARIC ACID) aide à mélanger l’eau et l’huile, l’ingrédient est également ajouté à de nombreux cosmétiques liquides et produits de soin de la peau et des cheveux à de faibles concentrations pour fonctionner comme un additif plutôt qu’un ingrédient actif ou un agent nettoyant. Dans ces produits, l’acide stéarique (STEARIC ACID) aide à empêcher les formules de se séparer en couches liquides et huileuses. En conséquence, les produits contenant de l’acide stéarique (STEARIC ACID) nécessitent moins d’agitation avant d’être utilisés et restent plus puissants lorsqu’ils sont stockés pendant de longues périodes. Est-ce que l’acide stéarique (STEARIC ACID) est naturel?

Parce que l’acide stéarique (STEARIC ACID) est dérivé de sources naturelles et n’est pas produit dans des environnements industriels, il est parfois utilisé comme alternative aux ingrédients chimiques dans les soins naturels de la peau. Souvent, l’ingrédient provient de sous-produits obtenus lors de la transformation de la viande, en particulier du porc. Pour cette raison, il n’est cependant pas fréquemment utilisé dans les cosmétiques et les soins de la peau végétaliens; L’acide stéarique (STEARIC ACID) d’origine végétale convient aux formules sans animaux.Puis-je utiliser de l’acide stéarique (STEARIC ACID)?

La Food and Drug Administration des États-Unis a conclu que l’acide stéarique (STEARIC ACID) est sans danger pour une utilisation topique dans les produits de soins de la peau en quantités limitées, ce qui indique que certaines personnes à la peau sensible peuvent être incapables de tolérer l’ingrédient. Introduction à l’acide stéarique (STEARIC ACID)

L’acide stéarique (STEARIC ACID), un autre nom de l’acide octadécanoïque CH3 (CH2) 16COOH, est l’un des acides gras les plus courants. Il existe sous forme d’ester de glycérol dans la plupart des graisses animales et végétales (Beare-Rogers, Dieffenbacher et Holm, 2001). L’acide stéarique (STEARIC ACID) est plus abondant dans les graisses animales (jusqu’à 30%) que dans les graisses végétales (généralement <5%). Les exceptions importantes sont le beurre de cacao et le beurre de karité, dans lesquels la teneur en acide stéarique (STEARIC ACID) (en tant que triglycéride) est de 28 à 45%. Contrairement aux autres acides gras saturés à longue chaîne, l’acide stéarique (STEARIC ACID) n’a aucun effet sur les concentrations de lipoprotéine cholestérol chez les hommes ou les femmes (Yu, Derr, Etherton, & Kris-Etherton, 1995). Les résultats de l’étude de Kelly et al. (2001) indiquent que l’acide stéarique (STEARIC ACID) (19 g / jour) dans l’alimentation a des effets favorables sur les facteurs de risque thrombogènes et athérogènes chez les hommes; les auteurs recommandent à l’industrie alimentaire d’envisager d’enrichir les aliments en acide stéarique (STEARIC ACID) au lieu d’acide palmitique et d’acides gras trans. Ainsi, l’acide stéarique (STEARIC ACID) est non toxique et biocompatible avec le corps humain. Avec un groupe de tête polaire qui peut se lier aux cations métalliques et une chaîne non polaire qui confère une solubilité dans les solvants organiques, l’acide stéarique (STEARIC ACID) est couramment utilisé dans la production de détergents, de savons et de cosmétiques, tels que les shampooings et les crèmes à raser. (CH2) 16CO2H)

L’acide stéarique (STEARIC ACID) est un acide gras saturé qui peut se déposer en surface dans des conditions particulières. Cet acide est insoluble dans l’eau et soluble dans l’éthanol. Le substrat en cuivre doit être nettoyé, décapé et trempé dans 10% de HNO3 en volume pour l’élimination des oxydes. L’échantillon propre doit être trempé dans une solution d’acide stéarique (STEARIC ACID) éthanolique (0,01 M) et 30 V CC doivent être appliqués. L’anode et la cathode doivent être en cuivre. L’étude des pics du diffractomètre à poudre à rayons X (XRD) prouve l’existence de composants stéarate de cuivre résultant de la réaction de l’acide stéarique (STEARIC ACID) avec le cuivre. Le composant résultant a été étudié en utilisant SEM (Figure 20). Ces composants fournissent la rugosité nécessaire et la faible énergie d’hydrophobie de sorte que l’angle de contact arrive à 153 ° et ainsi l’hystérésis de l’angle de contact diminue. D’autres chercheurs ont créé une couche auto-assemblée sur de l’alumine poreuse à l’aide d’acide stéarique (STEARIC ACID).28 Cette méthode a été réalisée sur de l’aluminium anodisé dans 0,01 volume de solution d’acide stéarique (STEARIC ACID) dans l’éthanol pendant 30 min sans appliquer de potentiel et une superhydrophobie a été obtenue.

La fonction principale de l’acide stéarique (STEARIC ACID), normalement 1 à 2 pce, est sa réaction avec l’oxyde de zinc pour fournir une forme réactive de zinc pour la complexation de l’accélérateur. Des concentrations plus élevées (8 phr) produisent des réductions mineures de la viscosité, de l’hystérésis et de la sécurité au grillage. Le gonflement dans l’eau à 70 ° C est sensiblement réduit de 15% à 8% au niveau de 8 phr dans les SBR 1502 et 1509 (mais pas 1500). Dans un système activé par la magnésie-zinc, une augmentation de l’acide stéarique (STEARIC ACID) à 6 pce était, sauf pour une traction réduite, sans effet. L’acide stéarique (STEARIC ACID) a été dissous dans 100 ml de 1-propanol. Après addition de 3,1 ml d’eau, la solution a été agitée pendant 30 minutes. Finalement, 13,7 g de sec-butoxyde d’aluminium ont été ajoutés et le mélange réactionnel a été agité pendant 20 minutes. Le gel préparé a été vieilli à 100 ° C pendant 50 h dans des conditions statiques. Après refroidissement, filtration et lavage avec de l’éthanol, le produit solide a été séché pendant une nuit à 50 ° C. La calcination a été effectuée dans un courant d’azote à 410 ° C puis sous air à 420 ° C d’acide stéarique (STEARIC ACID)

L’acide stéarique (STEARIC ACID) est un acide monobasique saturé avec 18 longueurs de chaîne carbonée. Il est synthétisé par hydrolyse de graisses animales ou par hydrogénation d’huile de coton ou d’huile végétale. L’acide stéarique (STEARIC ACID) commercial est un mélange d’acide stéarique (STEARIC ACID) et d’acide palmitique et myristique. Selon le rapport de l’acide stéarique (STEARIC ACID) à l’acide palmitique, il peut varier d’une structure macrocristalline (45:55 w / w) à microcristalline (entre 50:50 et 90:10 w / w) (Li & Wu, 2014). Les formes polymorphes de l’acide stéarique (STEARIC ACID) A, B et C (les plus stables) sont fabriquées en utilisant différents solvants organiques et conditions de cristallisation (Garti, Wellner et Sarig, 1980). Des études thermiques ont indiqué que l’acide stéarique (STEARIC ACID) de différents fournisseurs montrait peu de variabilité d’un lot à l’autre ou d’un fabricant à l’autre (Garti et al., 1980; Inaoka, Kobayashi, Okada et Sato, 1988).

En raison de sa surface spécifique inférieure, l’acide stéarique (STEARIC ACID) est utilisé à une concentration de 1% à 3% p / p. Etant donné que le stéarate de magnésium à une concentration de 0,25% p / p ramollit les comprimés fabriqués avec de l’amidon prégélatinisé et affecte potentiellement la résistance et la dissolution des comprimés, l’acide stéarique (STEARIC ACID) est le lubrifiant préféré pour l’amidon prégélatinisé. L’amidon subit une déformation plastique lors de la compression et a donc une sensibilité plus élevée à la concentration de stéarate de magnésium. De plus, comme rapporté par Fouda et al., Bien que le stéarate de magnésium ait accéléré la dégradation de l’aspirine, l’acide stéarique (STEARIC ACID) peut protéger les médicaments (aspirine) contre la dégradation (Fouda, Mady et El-Azab, 1998). De plus, l’acide stéarique (STEARIC ACID) peut également jouer un rôle dans la transformation de phase polymorphe des médicaments, ce qui a par la suite entraîné un ralentissement de la dissolution des comprimés (Wang, Davidovich, et al., 2010). La dissolution du comprimé était lente en raison de la transformation des formes polymorphes (forme II en forme I) du médicament, facilitée par l’acide stéarique (STEARIC ACID) (Wang, Davidovich et al., 2010). L’acide stéarique (STEARIC ACID) est un exemple typique d’acide gras qui sont essentiellement de longues chaînes hydrocarbonées contenant un groupe carboxyle à une extrémité et un groupe méthyle à l’autre. Les longueurs de chaîne peuvent varier de 3 (acide propionique) à 24 (acide lignocérique) mais la majorité des acides gras présents dans les huiles végétales ou animales hydrogénées ont une longueur d’environ C16-C20. L’acide stéarique (STEARIC ACID) est un acide saturé, car il n’y a pas de doubles liaisons entre les atomes de carbone voisins. Cela signifie que la chaîne hydrocarbonée est flexible et peut s’enrouler en boule ou s’étirer en un long zig-zag.

Il est fabriqué par extraction du suif, qui est le mélange de graisses obtenues par traitement à la vapeur de la graisse de vache. Le suif contient de la tristéarine (qui ne représente que 3 molécules d’acide stéarique (STEARIC ACID) jointes à une molécule de glycérol, représentée en bleu sur la figure), qui, après chauffage avec de l’hydoxyde de sodium, donne du stéarate de sodium.

acide stéarique (STEARIC ACID)

L’acide stéarique (STEARIC ACID) de TCC, également appelé acide octadécanoïque, est l’un des acides gras à longue chaîne les plus courants. On le trouve sous forme combinée dans les graisses naturelles animales et végétales. L’acide stéarique (STEARIC ACID) commercial est un mélange de quantités approximativement égales d’acides stéarique et palmitique et de petites quantités d’acide oléique. Il est utilisé dans la fabrication de bougies, de cosmétiques, de savons à raser, de lubrifiants et de produits pharmaceutiques.

Applications

L’acide stéarique (STEARIC ACID) de TCC est principalement utilisé dans la production de détergents, de savons et de cosmétiques tels que les shampooings et les crèmes à raser. L’acide stéarique (STEARIC ACID) est utilisé avec l’huile de ricin pour préparer des assouplissants dans l’encollage des textiles.

Étant peu coûteux et chimiquement inoffensif, l’acide stéarique (STEARIC ACID) trouve de nombreuses applications de niche. Il est utilisé dans la fabrication de bougies et comme durcisseur dans les bonbons lorsqu’il est mélangé avec du sucre simple et du sirop de maïs. Il est également utilisé pour produire des compléments alimentaires.

Dans les feux d’artifice, l’acide stéarique (STEARIC ACID) est souvent utilisé pour revêtir des poudres métalliques telles que l’aluminium et le fer. Cela empêche l’oxydation, permettant aux compositions d’être stockées pendant une période de temps plus longue.

L’acide stéarique (STEARIC ACID) est un lubrifiant courant lors du moulage par injection et du pressage des poudres céramiques. Il est également utilisé comme démoulage pour le latex mousse cuit dans des moules en pierre.

L’acide stéarique (STEARIC ACID) (nom systématique IUPAC: acide octadécanoïque) est l’un des types utiles d’acides gras saturés provenant de nombreuses graisses et huiles animales et végétales. C’est un solide cireux.

QU’EST-CE QUE L’acide stéarique (STEARIC ACID)

L’acide stéarique (STEARIC ACID) – avec la formule moléculaire C18H36O2, C17H35CO2H ou CH3 (CH2) 16COOH, et le numéro CAS 57-11-4 – est l’un des acides gras les plus utiles avec une longue chaîne carbonée. Aussi appelé acide octadécanoïque selon sa classification IUPAC préférée, l’acide stéarique (STEARIC ACID) tire son nom du mot grec signifiant suif.

L’ingrédient est fabriqué principalement à partir de triglycérides issus de graisses animales. Il peut être conservé à température ambiante et est souvent utilisé dans la création de savons et de bougies. L’acide stéarique (STEARIC ACID) est le plus souvent produit par le processus de saponification, qui convertit les graisses et les huiles en alcool et en savons en ajoutant de la chaleur avec un alcali liquide. La saponification est généralement effectuée sur des graisses animales et des huiles végétales.

STEARIC ACID (STEARK AST)

Table of Contents

STEARIC ACID (STEARK AST)

Explore:

EXPLORE

INFORMATIONS

NEWSLETTER