HEXAFLUOROSILICIC ACID (Hekza Floro Silisik Asit)

CAS No. : 16961-83-4

EC No. : 241-034-8

Synonyms:

Hexafluorosilicic acid; Fluorosilicic acid; hekzafluorosilisc asit; HEKSAFLUOROSLSK AST; HEXAFLOROSLSK AST; hekzaflorosilisik asid; 16961-83-4; Dihydrogen hexafluorosilicate; Silicate(2-), hexafluoro-, dihydrogen; hexafluorosilicon(2-); hydron; dihydrogen hexafluorosilanediuide; MFCD00036289; silicofluoridd; Hexafluorosilic acid; hydrofluorosilic acid; Kieselfluorwasserstoffsaure; DTXSID2029741; MolPort-006-109-631; OHORFAFFMDIQRR-UHFFFAOYSA-P; dihydrogen(.) hexafluorosilanediuide; hexakis(fluoranyl)silicon(2-); hydron; RL02185; AK186263; AN-18676; IN001967; KB-52401; SC-47078; FT-0626488; A811126; Hexafluorosilicic acid, 23% w/w aqueous solution; J-521443; Hexafluorosilicic acid solution, 23 wt. % in water 100g; fluorosilicic acid; hexafluorosilicic acid; hydrofluorosilicic acid; silicon hexafluoride dihydride; Hexafluorosilicic acid; 01302; Fluosilicic acid; Hexafluorosilicic acid; ACTH;ACTH 1-39;Sand acid ;CORTICOTROPHIN;CORTICOTROPIN A;FLUOSILICIC ACID;FLUOROSILIC ACID;Fluorsilicic acid; SILICOFLUORIC ACID; FLUOROSILICIC ACID; Hexafluorosilicic Acid; MFCD00036289; 69109 Hexafluorosilicic acid, 23% w/w aq. soln.; L14829 Hexafluorosilicic acid, 35% w/w aq. soln.; HEXAFLUOROSILICICACID; FLUOROSILICIC ACID; Alfa AesarTM Hexafluorosilicic acid, 35% w/w aq. soln.; hexafluorosilicic acid; Fluorosilicic Acid; Fluorosilicic acid (FSA); Hexafluorosilicic acid (HFA or HFS); Sand acid; Silicate(2-), hexafluoro- hydrogen (1:2); Silicofluoride; Fluosilicic acid; Hydroflurosilicic acid; Silicofluoric acid; Silicon hexafluoride dihydride; Silicate(2-), hexafluoro-, dihydrogen; Hexafluorosilicic acid 35% (w/w) in aqueous solution; Hexafluorosilicic acid (23% aqueous solution); Hexafluorosilicic acid; Hexafluorosilicic Acid; HEXAFLUOROSILICIC ACID 34%; Hexafluorosilicic acid; Electronic Grade Hexafluorosilicic Acid Solution; Hexafluorosilicic; HEKSAFLOROSLK AST; HEKSAFLOROSLSK AST; HEKSAFLOROSLSK AST; HEXA FLORO SLSK AST; heksa salisilik asit; heksa; hexa; hepta; heptaflorosilisik asit; heksaflorosilisik asit; heksa; floro; flor; silisik; slisik; silisilik asit; heksa floro silisik asit; heksa floro silisik acid; ion chromatography (IC); ultraviolet (UV) detector; conductivity detector; hexafluorosilicic acid; heksafloroslsk asd; heksa floro slsk ast; heksa floro salsk acde; heksa floro salsk asid; HEKSA FLORO SALISIK ASIT; FH2O2Si; fluorosilicic acid; hexafluorosilicic acid; hydrofluorosilicic acid; silicon hexafluoride dihydride; Hexafluorosilicic acid; Fluorosilicic acid;16961-83-4; Dihydrogen hexafluorosilicate; Silicate(2-), hexafluoro-, dihydrogen; hexafluorosilicon(2-); hydron;dihydrogen; hexafluorosilanediuide; MFCD00036289; silicofluoridd; Hexafluorosilic acid; hydrofluorosilic acid; DTXSID2029741; MolPort-006-109-631; OHORFAFFMDIQRR-UHFFFAOYSA-P; dihydrogen(.) hexafluorosilanediuide; hexakis(fluoranyl)silicon(2-); hydron;RL02185; AK186263; AN-18676; IN001967; KB-52401; SC-47078; FT-0626488; A811126; Hexafluorosilicic acid, 23% w/w aqueous solution; J-521443;Hexafluorosilicic acid solution, 23 wt. % in water 100g;DIHYDROGEN HEXAFLUOROSILICATE; DIHYDROGEN HEXAFLUOROSILICATE(2-); FLUOROSILIC ACID; FLUOROSILICIC ACID; FLUOROSILICIC ACID (H2SIF6);FLUOSILICIC ACID;HEXAFLUOROSILICIC ACID; HEXAFLUOSILICIC ACID; HYDROFLUOROSILICIC ACID; HYDROFLUOSILIC ACID; HYDROFLUOSILICIC ACID; HYDROGEN HEXAFLUOROSILICATE; HYDROGEN HEXAFLUOROSILICATE (H2SIF6); SAND ACID; SILICOFLUORIC ACID; SILICON HEXAFLUORIDE DIHYDRIDE; Acide fluorosilicique [French]; Acido fluosilicico [Italian]; Dihydrogen hexafluorosilicate [ACD/IUPAC Name]; Dihydrogenhexafluorosilicat [German] [ACD/IUPAC Name];Hexafluorosilicate de dihydrogène [French] [ACD/IUPAC Name];Hexafluorosilicic acid [Wiki];Silicate(2-), hexafluoro-, dihydrogen [ACD/Index Name]; Acide fluosilicique [French]; Caswell No. 463; CCRIS 2296; DIHYDROGEN HEXAFLUOROSILANEDIUIDE; Dihydrogen hexafluorosilicate (2-); Dihydrogen hexafluorosilicate(2-); Fluorosilicic acid; Fluorosilicic acid [UN1778] [Corrosive]; Fluosilicic acid; Hexafluorokieselsaeure [German]; Hexafluorokiezelzuur [Dutch]; Hexafluorosilic acid; Hexafluorosilicic acidaqueous; hexafluorosilicon(2-); hydron; Hexafluosilicic acid; HSDB 2018; Hydrofluorosilicic acid; Hydrofluosilicic acid; Hydrogen hexafluorosilicate; Hydrosilicofluoric acid; Kiezelfluorwaterstofzuur [Dutch]; MFCD00036289 [MDL number]; NSC 16894;Sand acid; SILICOFLUORIC ACID; Silicofluoride; Silicon hexafluoride dihydride; UN1778;??? [Chinese]; ACTH; ACTH 1-39; Sand acid; CORTICOTROPHIN; CORTICOTROPIN A;FLUOSILICIC ACID;FLUOROSILIC ACID;Fluorsilicic acid;SILICOFLUORIC ACID;FLUOROSILICIC ACID;FSA ; H2SIF6 ; HEXAFLUOROSILICIC ACID ; HYDROFLUOROSILICIC ACID ; HYDROSILICOFLUORIC ACID; Fluorosilicic acid; Hydrogen hexafluorosilicate; Fluorosilicic acid solution; Dihydrogen hexafluorosilicate; Silicate(2-), hexafluoro-, dihydrogen; silicofluoridd; Silicofluoric acid; hydrofluorosilic acid; Tetrafluorosilane dihydrofluorideCorticotropin; Dihydrogen hexafluorosilicate; FKS ; Fluosilicic acid (6CI); Fluorosilicic acid; Hexafluorosilicic acid; Hexafluorosilicate (2 – ), dihydrogen; Hexafluosilicic acid; Hydrofluorosilicic acid; Hydrofluosilicic acid; Hydrogen hexafluorosilicate; Hydrogen hexafluorosilicic; Hydrosilicofluoric acid; Sand acid; Silicate (2-), hexafluoro-, dihydrogen (8CI, 9CI); Silicic acid (H2SiF6) ;Silicofluoric acid; Silicofluoride Silicon hexafluoride dihydride; UN1778 (DOT);Silicate(2-), Hexafluoro-, Dihydrogen; Fluorosilicic Acid; Hexafluorosilicic acid; ACTH; ACTH 1-39; ACTH (1-39), HUMAN; ADRENOCORTICOTROPIC HORMONE (1-39) (HUMAN); ADRENOCORTICOTROPIC HORMONE HUMAN; CORTICOTROPHIN; CORTICOTROPIN; CORTICOTROPIN A; CORTICOTROPIN (HUMAN); DIHYDROGEN HEXAFLUOROSILICATE; FLUOROSILIC ACID; FLUOROSILICIC ACID; FLUOSILICIC ACID;HEXAFLUOROSILICIC ACID;HEXAFLUOSILICIC ACID;H-SER-TYR-SER-MET-GLU-HIS-PHE-ARG-TRP-GLY-LYS-PRO-VAL-GLY-LYS-LYS-ARG-ARG-PRO-VAL-LYS-VAL-TYR-PRO-ASN-GLY-ALA-GLU-ASP-GLU-SER-ALA-GLU-ALA-PHE-PRO-LEU-GLU-PHE-OH;HYDROFLUOROSILICIC ACID;HYDROFLUOSILICIC ACID;HYDROGEN HEXAFLUOROSILICATE;HYDROSILICOFLUORIC ACID;16961-83-4; silicate(2-), hexafluoro-; hexafluorosilicate; tetrafluorosilane dihydrofluoride; Hydrofluosilicic acid; Hexafluorosilicic Acid; Fluorosilicic acid; Sand acid; CORTICOTROPHIN; CORTICOTROPIN A; FLUOROSILIC ACID; 16961-83-4; Dihydrogenhexafluorosilicate; hexafluorosilicon(2-); hydron; dihydrogenhexafluorosilanediuide; Silicate(2-),hexafluoro-,dihydrogen;SILICOFLUORIC; ACID; SYSMEHFRWGKPVGKKRRPVKVYPNGAEDESAEAFPLEF; SER-TYR-SER-MET-GLU-HIS-PHE-ARG-TRP-GLY-LYS-PRO-VAL-GLY-LYS-LYS-ARG-ARG-PRO-VAL-LYS-VAL-TYR-PRO-ASN-GLY-ALA-GLU-ASP-GLU-SER-ALA-GLU-ALA-PHE-PRO-LEU-GLU-PHE;SER-TYR-SER-MET-GLU-HIS-PHE-ARG-TRP-GLY-; HEKZA FLOROSILIS ACID; HEKZAFLOROSILICACID; HEKSA FLORASILIS ACID; HEKSA FLOROSILIS ASIT; heksaflorosilisasit; hekzaflorosilisacid; HEKZAFLOROSLSLC AST; hekzafulorosilicicacide; hekzafloroslyslicicaicde; hexaflorosilicicasit; hexaflorosilisik; asit; HEXAFLUOROSILICIC ACID; hexafluorosilicic acid; heksaflorosilisik asit; hegzaflorosilisik asit; hekza floro silisik asit; hekzafloro silisik asit; HEGSAFLORO SLSK AST; heksaflorosilisik asit; hegzaflurosilisikasit; hexafoloro silisik asit; hegxa fluro silisik asit; hegzaflorosilisikasit; hexaflorosilisic acid; silisik asit; florosilisikasit; hegza floro silisik asit; hexafluorosilisicasit; hexaflorosilisik asid; hexa florsilisik asit; hexafluorosilisic acid; heksafluoro silisicacid; silisik asit; hegsafloro silsic acid; ;HEXAFLUOROSILICIC ACID; HEXAFLUOROSLCC ACD; HEKSAFLOROSLSK AST; HEGZAFLOROSLSK AST; HEKZA FLORO SLSK AST; HEKZAFLORO SLSK AST; HEGSAFLORO SLSK AST; HEKSAFLOROSLSK AST; HEGZAFLUROSLSKAST; HEXAFOLORO SLSK AST; HEGXA FLURO SLSK AST; HEGZAFLOROSLSKAST; HEXAFLOROSLSC ACD; SLSK AST; FLOROSLSKAST; HEGZA FLORO SLSK AST; HEXAFLUOROSLSCAST; HEXAFLOROSLSK ASD; HEXA FLORSLSK AST; HEXAFLUOROSLSC ACD; HEKSAFLUORO SLSCACD; SLSK AST; HEGSAFLORO SLSC ACD; HEXAFLUOROSILICIC ACID HEXAFLUOROSILICIC ACID HEXAFLUOROSILICIC ACID; HEXAFLUOROSILICIC ACID; hexafluorosilicic acid; heksaflorosilisik asit; hegzaflorosilisik asit; hekza floro silisik asit; hekzafloro silisik asit; HEGSAFLORO SLSK AST; heksaflorosilisik asit; hegzaflurosilisikasit; hexafoloro silisik asit; hegxa fluro silisik asit; hegzaflorosilisikasit; hexaflorosilisic acid; silisik asit; florosilisikasit; hegza floro silisik asit; hexafluorosilisicasit; hexaflorosilisik asid; hexa florsilisik asit; hexafluorosilisic acid; heksafluoro silisicacid; 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hexafluorosilisicasit; hexaflorosilisik asid; hexa florsilisik asit; hexafluorosilisic; Hexafluorosilicic acid; Fluorosilicic acid; hekzafluorosilisc asit; HEKSAFLUOROSLSK AST; HEXAFLOROSLSK AST; hekzaflorosilisik asid; 16961-83-4; Dihydrogen hexafluorosilicate; Silicate(2-), hexafluoro-, dihydrogen; hexafluorosilicon(2-); hydron; dihydrogen hexafluorosilanediuide; MFCD00036289; silicofluoridd; Hexafluorosilic acid; hydrofluorosilic acid; Kieselfluorwasserstoffsaure; DTXSID2029741; MolPort-006-109-631; OHORFAFFMDIQRR-UHFFFAOYSA-P; dihydrogen(.) hexafluorosilanediuide; hexakis(fluoranyl)silicon(2-); hydron; RL02185; AK186263; AN-18676; IN001967; KB-52401; SC-47078; FT-0626488; A811126; Hexafluorosilicic acid, 23% w/w aqueous solution; J-521443; Hexafluorosilicic acid solution, 23 wt. % in water 100g; fluorosilicic acid; hexafluorosilicic acid; hydrofluorosilicic acid; silicon hexafluoride dihydride; Hexafluorosilicic acid; 01302; Fluosilicic acid; Hexafluorosilicic acid; ACTH;ACTH 1-39;Sand acid ;CORTICOTROPHIN;CORTICOTROPIN A;FLUOSILICIC ACID;FLUOROSILIC ACID;Fluorsilicic acid;SILICOFLUORIC ACID;FLUOROSILICIC ACID; Hexafluorosilicic Acid; MFCD00036289; 69109 Hexafluorosilicic acid, 23% w/w aq. soln.; L14829 Hexafluorosilicic acid, 35% w/w aq. soln.; HEXAFLUOROSILICICACID; FLUOROSILICIC ACID; Alfa AesarTM Hexafluorosilicic acid, 35% w/w aq. soln.; hexafluorosilicic acid; Fluorosilicic Acid; Fluorosilicic acid (FSA); Hexafluorosilicic acid (HFA or HFS); Sand acid; Silicate(2-), hexafluoro- hydrogen (1:2); Silicofluoride; Fluosilicic acid; Hydroflurosilicic acid; Silicofluoric acid; Silicon hexafluoride dihydride; Silicate(2-), hexafluoro-, dihydrogen; Hexafluorosilicic acid 35% (w/w) in aqueous solution; Hexafluorosilicic acid (23% aqueous solution); Hexafluorosilicic acid; Hexafluorosilicic Acid; HEXAFLUOROSILICIC ACID 34%; Hexafluorosilicic acid; Electronic Grade Hexafluorosilicic Acid Solution; Hexafluorosilicic; HEKSAFLOROSLK AST; HEKSAFLOROSLSK AST; HEKSAFLOROSLSK AST; HEXA FLORO SLSK AST; heksa salisilik asit; heksa; hexa; hepta; heptaflorosilisik asit; heksaflorosilisik asit; heksa; floro; flor; 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HEXAFLUOROSILICIC ACID (Hekza Floro Silisik Asit)

H2SiF6 + 2 H2O → 6 HF + “SiO2”

Neutralization of solutions of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) with alkali metal bases produces the corresponding alkali metal fluorosilicate salts:

(H3O)2SiF6 + 2 NaOH → Na2SiF6 + 4 H2O

The resulting salt Na2SiF6 is mainly used in water fluoridation. Related ammonium and barium salts are produced similarly for other applications.

Near neutral pH, hexafluorosilicate salts hydrolyze rapidly according to this equation:[8]

SiF2-

6 + 2 H2O → 6 F- + SiO2 + 4 H+

Uses

The majority of the Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is converted to aluminium fluoride and cryolite.[6] These materials are central to the conversion of aluminium ore into aluminium metal. The conversion to aluminium trifluoride is described as:

H2SiF6 + Al2O3 → 2 AlF3 + SiO2 + H2O HEKZA FLOROSILIS ACID; HEKZAFLOROSILICACID; HEKSA FLORASILIS ACID; HEKSA FLOROSILIS ASIT; heksaflorosilisasit; hekzaflorosilisacid; HEKZAFLOROSLSLC AST; hekzafulorosilicicacide; hekzafloroslyslicicaicde; hexaflorosilicicasit; hexaflorosilisikasit ,

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is also used as an electrolyte in the Betts electrolytic process for refining lead.

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) (identified as hydrofluorosilicic acid on the label) along with oxalic acid are the active ingredients used in Iron Out rust-removing cleaning products, which are essentially varieties of laundry sour.

Niche applications

H2SiF6 is a specialized reagent in organic synthesis for cleaving Si-O bonds of silyl ethers. It is more reactive for this purpose than HF. It reacts faster with t-butyldimethysilyl (TBDMS) ethers than triisopropylsilyl (TIPS) ethers.[9]

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) and the salts are used as wood preservation agents.

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) can release hydrogen fluoride when evaporated, so it has similar risks. Inhalation of the vapors may cause lung edema. Like hydrogen fluoride, it attacks glass and stoneware.[11] The LD50 value of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is 430 mg/kg.[12]

Molecular Weight 144.091 g/mol

Hydrogen Bond Donor Count 2

Hydrogen Bond Acceptor Count 7

Physical Description

Fluorosilicic acid appears as a colorless fuming liquid with a penetrating pungent odor. Corrosive to metals and tissue. Both the fumes and very short contact with the liquid can cause severe and painful burns. Used in water fluoridation, in hardening cement and ceramics, as a wood preservative.

Boiling Point of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) : 212 °F at 760 mm Hg (water) approx.

Melting Point of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) : -4 °F

Density of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) : 1.3 at 77 °F (approx.)

USES OF Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Antiadhesive Used to prevent adhesion

Antisetoff Spray powder used to make air gap between printed sheets of paper

Building_material Materials used in the building process, such as flooring, insulation, caulk, tile, wood, glass, etc.

Casting_agent Casting agents or molding compounds for plastics, sand, or metals

Child_use Related to products specifically designed for children (e.g. toys, children’s cosmetics, etc)

Fertilizer Fertilizer for consumer or industrial use, and manufacturing of fertilizers

Fluid_property_modulator Includes antifoaming agents, coagulating agents, dispersion agents, emulsifiers, flotation agents, foaming agents, viscosity adjustors, etc

Food_contact Includes food packaging, paper plates, cutlery, small appliances such as roasters, etc.; does not include facilities that manufacture food

Manufacturing, automotive Generally related to automobiles or their manufacture, used when automotive_care or automotive_component are not applicable (e.g. auto fuel, GPS units), or detailed information is not known

Industry Uses of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

– Agricultural chemicals (non-pesticidal)

– Corrosion inhibitors and anti-scaling agents

– Flame retardants

– Fluorinating agent

– Oxidizing/reducing agents

– Plating agents and surface treating agents

– Processing aids, not otherwise listed

– Surface active agents

– Water Fluoridation

– Water Treatment Processing and other miscellaneous uses

General Manufacturing Information

– Construction

– Nonmetallic mineral product manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other nonmetallic mineral product manufacturing.

– Pesticide, fertilizer, and other agricultural chemical manufacturingServices

– Soap, cleaning compound, and toilet preparation manufacturing

– Utilities

– Wholesale and retail trade

Health Hazard of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Inhalation of vapor produces severe corrosive effect on mucous membrane. Ingestion causes severe burns of mouth and stomach. Contact with liquid or vapor causes severe burns of eyes and skin.

Fire Hazard of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Special Hazards of Combustion Products: Irritating fumes of hydrogen fluoride may form in fire.

General description hexafluoro silicic acid

High-silic fluoro silicic acids have been prepared. They have desired amount of extra silica upto 18% more than the composition as represented by H2SiF6.[3] Preparation and properties of fluosilicic acid have been reported.[4] Fluosilicic acid can be obtained as a major byproduct of phosphate fertilizer industry.[7]It can be used in the preparation of sodium fluorosilicate, via neutralization with sodium chloride.[6] It can also undergo neutralization with ammonia to produce ammonium fluoride and silica.[7]

Appearance Light yellow liquid

Application

Fluosilicic acid (FSA, H2SiF6) has been used in the following studies:

• Fluoridation of fluoridated municipal water supplies.

• Surface modification of calcium carbonate.

• Liquid phase deposition (LPD) of silica.

About Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is a water insoluble Silicon source for use in oxygen-sensitive applications, such as metal production. In extremely low concentrations (ppm), fluoride compounds are used in health applications. Fluoride compounds also have significant uses in synthetic organic chemistry. They are commonly also used to alloy metal and for optical deposition. Certain fluoride compounds can be produced at nanoscale and in ultra high purity forms. Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is generally immediately available in most volumes. Ultra high purity and high purity compositions improve both optical quality and usefulness as scientific standards. Nanoscale elemental powders and suspensions, as alternative high surface area forms, may be considered. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Description

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is a kind of inorganic acid. It is majorly used for the fluoridation of water in United State to minimize the incidence of dental caries and dental fluorosis. For chemical synthesis, it is majorly used for the manufacturing of aluminum fluoride and cryolite as well as many kinds of hexafluorosilicate salts. It can also be used for the production of silicon and silicon dioxide. It can also be used as an electrolyte in the Betts electrolytic process for refining lead. It is also a specialized reagent in organic synthesis for cleaving Si-O bonds of silyl ethers.

Fluosilicic acid,H2SiF6, also known as hydrofluorosilicic acid,is a colorless liquid that is soluble in water. It is highly corrosive and toxic,attacking glass and stoneware. Fluosilicic acid is used in water fluoridation, electroplating, and in manufacturing enamels and cement.

Chemical Properties

Fluorosilicic acid is a transparent, colorless fuming liquid.

Uses Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

wing and bottling establishments. Other concentrations are used in the electrolytic refining of lead, in electroplating, for hardening cement, crumbling lime or brick work, for the removal of lime from hides during the tanning process, to remove molds, as preservative for timber.

General Description Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

A colorless fuming liquid with a penetrating pungent odor. Corrosive to metals and tissue. Both the fumes and very short contact with the liquid can cause severe and painful burns. Used in water fluoridation, in hardening cement and ceramics, as a wood preservative.

Air & Water Reactions

Fumes in air. Soluble in water with release of heat and corrosive fumes.

Reactivity Profile Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Hazard Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Extremely corrosive by skin contact and inhalation.

Health Hazard

Inhalation of vapor produces severe corrosive effect on mucous membrane. Ingestion causes severe burns of mouth and stomach. Contact with liquid or vapor causes severe burns of eyes and skin.

Special Hazards of Combustion Products: Irritating fumes of hydrogen fluoride may form in fire.

Industrial uses of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Hydrofluorosilicic acid (H2SiF6) is a colorless to light brown liquid. It is also manufactured from calcium fluoride or other fluoride-containing products. Hydrofluorosilic acid is a strong depressant for many silicates during flotation of a number of oxidic minerals. It is used for gangue depression during flotation of tin, columbite and tantalite.

Safety Profile of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

(H3O)2SiF6 + 2 NaOH → Na2SiF6 + 4 H2O

The resulting salt Na2SiF6 is mainly used in water fluoridation. Related ammonium and barium salts are produced similarly for other applications.

Near neutral pH, hexafluorosilicate salts hydrolyze rapidly according to this equation:[8]

SiF2-6 + 2 H2O → 6 F- + SiO2 + 4 H+

Uses

Hexafluorosilic acid is manufactured as a concentrated solution that contains a significant amount of hydrofluoric acid (HF) to prevent the dissociation and hydrolysis of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit). In an aqueous environment, hexafluorosilic acid dissociates with the formation of hydrogen fluoride:

The overall rate and equilibrium constant of the overall reaction will be influenced by pH and concentration, but at typical environmental pH, the dissociation and hydrolysis of hexafluorosilicate to fluoride is essentially 100%.

H2SiF6 + Al2O3 → 2 AlF3 + SiO2 + H2O

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is also converted to a variety of useful hexafluorosilicate salts. The potassium salt, Potassium fluorosilicate, is used in the production of porcelains, the magnesium salt for hardened concretes and as an insecticide, and the barium salts for phosphors.

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is an inorganic compound with the chemical formula H2SiF6 also written as (H3O)2[SiF6]. It is a colorless liquid mostly encountered as diluted aqueous solution, from there, the second chemical notation also proposed. Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) has a distinctive sour taste and pungent smell. It is produced naturally on a large scale in volcanoes.[1][2] It is manufactured as a coproduct in the production of phosphate fertilizers. The resulting Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is almost exclusively consumed as a precursor to aluminum trifluoride and synthetic cryolite, which are used in aluminium processing. Salts derived from Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) are called hexafluorosilicates.

Contents

1 Structure

2 Production and principal reactions

3 Uses

3.1 Niche applications

4 Natural salts

5 Safety

6 See also

7 References

Structure

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is generally assumed to consist of oxonium ions charge balanced by hexafluorosilicate dianions as well as water. In aqueous solution, the hydronium cation (H3O+) is traditionally equated with a solvated proton, and as such, the formula for this compound is often written as H

2SiF6. Extending that metaphor, the isolated compound is then written as H2SiF6·2H2O, or (H3O)2SiF6.The situation is similar to that for chloroplatinic acid, fluoroboric acid, and hexafluorophosphoric acid. Hexafluorosilicate is an octahedral anion; the Si-F bond distances are 1.71 Å.[3] Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is only available commercially as solution.[4]

Production and principal reactions

The commodity chemical hydrogen fluoride is produced from fluorite by treatment with sulfuric acid.[5] As a by-product, approximately 50 kg of (H3O)2SiF6 is produced per tonne of HF owing to reactions involving silica-containing mineral impurities. (H3O)2SiF6 is also produced as a by-product from the production of phosphoric acid from apatite and fluorapatite. Again, some of the HF in turn reacts with silicate minerals, which are an unavoidable constituent of the mineral feedstock, to give silicon tetrafluoride. Thus formed, the silicon tetrafluoride reacts further with HF. The net process can be described as:[6]

SiO2 + 6 HF → SiF2-6 + 2 H3O+

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) can also be produced by treating silicon tetrafluoride with hydrofluoric acid.

In water, Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) readily hydrolyzes to hydrofluoric acid and various forms of amorphous and hydrated silica (“SiO2”). At the concentration usually used for water fluoridation, 99% hydrolysis occurs and the pH drops. The rate of hydrolysis increases with pH. At the pH of drinking water, the degree of hydrolysis is essentially 100%.[7]

H2SiF6 + 2 H2O → 6 HF + “SiO2”

(H3O)2SiF6 + 2 NaOH → Na2SiF6 + 4 H2O

The resulting salt Na2SiF6 is mainly used in water fluoridation. Related ammonium and barium salts are produced similarly for other applications.

Near neutral pH, hexafluorosilicate salts hydrolyze rapidly according to this equation:[8]

SiF2-

6 + 2 H2O → 6 F- + SiO2 + 4 H+

Uses

H2SiF6 + Al2O3 → 2 AlF3 + SiO2 + H2O

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is also used as an electrolyte in the Betts electrolytic process for refining lead.

Niche applications of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) and the salts are used as wood preservation agents.

Natural salts

Some rare minerals, encountered either within volcanic or coal-fire fumaroles, are salts of the Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit). Examples include ammonium hexafluorosilicate that naturally occurs as two polymorphs: cryptohalite and bararite.[11][12][13]

Safety

Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) can release hydrogen fluoride when evaporated, so it has similar risks. Inhalation of the vapors may cause lung edema. Like hydrogen fluoride, it attacks glass and stoneware.[14] The LD50 value of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit) is 430 mg/kg.

Chemical Properties

Fluorosilicic acid is a transparent, colorless fuming liquid.

Uses Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

General Description Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Air & Water Reactions

Fumes in air. Soluble in water with release of heat and corrosive fumes.

Reactivity Profile Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Hazard Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Extremely corrosive by skin contact and inhalation.

Health Hazard

Inhalation of vapor produces severe corrosive effect on mucous membrane. Ingestion causes severe burns of mouth and stomach. Contact with liquid or vapor causes severe burns of eyes and skin.

Special Hazards of Combustion Products: Irritating fumes of hydrogen fluoride may form in fire.

Industrial uses of Hexafluorosilicic Acid (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID)

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit), kimyasal formülü (H30) 2SiF6 (ayrca (H30) 2 [SiF6] olarak da yazlr) ile inorganik bir bileiktir. Seyreltilmeden nadiren karlalan renksiz bir svdr. Heksafluorosilik asit, belirgin bir eki tada ve keskin bir kokuya sahiptir. Volkanlarda doal olarak büyük ölçekte üretilir. [1] [2] Fosfat gübrelerinin üretiminde bir kopotif olarak üretilmektedir. Elde edilen Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) , alüminyum ilemede kullanlan alüminyum triflorür ve sentetik kriyolitin öncüsü olarak neredeyse tamamen tüketilir. Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) ten türetilen tuzlara heksaflüorosilikatlar denir.

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) in genellikle heksaflorosilikat dianyonlar ile dengelenmi oksonyum iyonlarnn yan sra sudan olutuu varsaylr. Sulu çözeltide, hidronyum katyonu (H30 +) geleneksel olarak solvatlanm bir protonla eitlenir ve bu nedenle bu bileik için formül genellikle H2SiF6 olarak yazlr. Bu metaforu uzatan, izole edilmi bileik daha sonra H2SiF6 · 2H2O veya (H3O) 2SiF6 olarak yazlr. Heksaflorosilikat bir oktahedral anyon; Si – F ba mesafeleri 1,71 Å’dir.Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) , sadece ticari olarak çözelti halinde bulunur.

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) kullanm

Bira ve ieleme tesislerinde sterilizasyon ekipman için% 1-2’lik bir çözelti yaygn olarak kullanlmaktadr. Kurunun elektrolitik rafine edilmesinde, elektrokaplamada, çimentoyu sertletirmek, kireç veya tula ilerini krmak, bronzlama ilemi srasnda kirecin deriden çkarlmas, kalplarn çkarlmas için kereste koruyucu olarak kullanlr.

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) in Endüstriyel Kullanmlar

– Tarm kimyasallar (böcek öldürücü olmayan)

– Korozyon önleyiciler ve kireç önleyici maddeler

– Alev geciktiriciler

– Florlama maddesi

– Oksitleyici / indirgeyici ajanlar

– Kaplama maddeleri ve yüzey ileme maddeleri

– Aksi listelenmemi ileme yardmclar

– Yüzey aktif maddeler

– Su Florürleme

– Su Artma leme ve dier çeitli kullanmlar

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit)

“Florosilikat” buraya yönlendirir. Florosilikat cam ve cam seramikler için bkz. Florosilikat cam .

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) )

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) ) moleküler yaps.png

Hexafluorosilicic-asit-3D.png

simler

Tercih edilen IUPAC ad

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) )

Sistematik IUPAC ad

Dihidrojen heksaflorosilikat

Dier isimler

Florosilik asit, fluosilik asit, hidroflorosilik asit, silikoflorür, silikoflorik asit, oksonyum hekzaflorosilanediuid, oksonyum hekzafloridosilikat

NFPA 704 (ate elmas)

NFPA 704 dört renkli elmas

Alevlenme noktas Yanc deil

Ölümcül doz veya konsantrasyon (LD, LC):

LD 50 ( ortalama doz ) 430 mg / kg (oral, sçan)

Bantl bileikler

ier katyonlar Amonyum heksaflorosilikat

Sodyum florosilikat

Bantl bileikler Heksaflüorofosforik asit

fluoroborik asit

Aksi belirtilmedii sürece, veriler standart hallerinde (25 ° C [77 ° F], 100 kPa) malzemeler için verilmitir.

Bilgi kutusu referanslar

2SiF6olarak da yazlmtr (H3Ö)2[SiF6] . Çounlukla seyreltilmi sulu çözelti olarak karlalan renksiz bir svdr, oradan ikinci kimyasal notasyon da önerilmitir. Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) ) in kendine özgü eki bir tad ve keskin bir kokusu vardr. Volkanlarda büyük ölçüde doal olarak üretilir. [1] [2] Fosfatl gübre üretiminde ortak ürün olarak üretilmitir. Elde edilen heksaflorosilik asit neredeyse yalnzca alüminyum ilemede kullanlan alüminyum triflorür ve sentetik kriyolit için bir öncü olarak tüketilir . Heksafluorosilisik asitten türetilen tuzlar olarak adlandrlr heksaflorosilikat .

Yap

Heksaflorosilik asitin genel olarak heksaflorosilikat dianyonlar ile dengelenmi oksonyum iyonlar ve su içerdii varsaylr . Sulu çözeltide, hidronyum katyonu (H 3 O + ) geleneksel olarak solvatl bir proton ile eitlenir ve bu nedenle, bu bileiin formülü genellikle H olarak yazlr.

2SiF6. Bu metafor geniletilerek, izole edilmi bileik daha sonra H olarak yazlr.

2SiF 6· 2H 2O veya (H 3Ö) 2SiF6Durum kloroplatinik asit , floroborik asit ve heksaflorofosforik asit için olana benzer . Hekzaflorosilikat, oktahedral bir anyondur; Si – F ba mesafeleri 1,71 Å’dur . [3] Hekzaflorosilik asit sadece ticari olarak çözelti olarak mevcuttur. [4]

Üretim ve temel tepkiler

Emtia kimyasal hidrojen florür , sülfürik asit ile ilenerek floritten üretilir . [5] de, bir yan ürün olarak, yaklak 50 kg (lH 3 O) 2 SiF 6 silika içeren mineral kirlilikleri içeren reaksiyonlar nedeniyle HF tonu bana üretilir. (H 3 O) 2 SiF 6 , ayn zamanda, üretim, bir yan ürün olarak üretilen fosforik asit gelen apatit ve fluorapatit . Yine, HF’nin bir ksm, mineral besleme stounun kaçnlmaz bir bileeni olan silikat mineralleri ile reaksiyona girer.silikon tetraflorür . Böylece oluan silikon tetraflorür, HF ile daha fazla reaksiyona girer. Net süreç u ekilde tanmlanabilir: [6]

Hekzaflorosilik asit ayrca silikon tetraflorürün hidroflorik asit ile ilenmesiyle de üretilebilir.

Suda, heksafluorosilisik asit, kolaylkla hidrolize hidroflorik asit ve ekilsiz hidratlanm çeitli formlar , silika ( “SiO 2 “). Genellikle su floridasyonu için kullanlan konsantrasyonda,% 99 hidroliz meydana gelir ve pH düer. Hidroliz oran pH ile artar. çme suyunun pH’nda hidroliz derecesi esasen% 100’dür. [7]

H 2 SiF 6 + 2 H 2 O → 6 HF + “SiO 2 ”

Alkali metal bazlarla hekzaflorosilik asit çözeltilerinin nötralizasyonu, ilgili alkali metal florosilikat tuzlarn üretir:

(H 3 O) 2 SiF 6 + 2 NaOH → Na 2 SiF 6 + 4 H 2 O

Elde edilen tuz, Na 2 SiF 6 esas olarak su flor kullanlr. lgili amonyum ve baryum tuzlar, dier uygulamalar için benzer ekilde üretilir

Nötr pH civarnda, heksaflorosilikat tuzlar, bu denkleme göre hzl hidrolize: [8]

Hekzaflorosilik asidin çou alüminyum florür ve kriyolit’e dönütürülür . [6] Bu malzemeler, alüminyum cevherinin alüminyum metale dönütürülmesinde merkezidir . Alüminyum triflorüre dönüüm u ekilde tanmlanr:

H 2 SiF 6 + Al 2 O 3 → 2 AlF 3 + SiO 2 + H 2 O

Hekzaflorosilik asit ayrca çeitli faydal heksaflorosilikat tuzlarna dönütürülür. Potasyum tuzu, Potasyum florosilikat , porselen üretiminde, sertletirilmi betonlar için magnezyum tuzu ve insektisit olarak ve fosforlar için baryum tuzlarnda kullanlmaktadr.

Hekzaflorosilik asit ayrca Betts elektrolitik ileminde kurunun rafine edilmesi için bir elektrolit olarak kullanlr .

Oksalik asitle birlikte hekzaflorosilik asit (etikette hidroflorosilik asit olarak tanmlanmtr) , esasen çamar eki çeitleri olan Iron Out pas sökücü temizleme ürünlerinde kullanlan aktif bileenlerdir .

Ni uygulamalar

H 2 SiF 6 bir uzmanlam reaktif olarak organik sentez Si-O balarnn bölünmesi için silil eterler . Bu amaç için HF’den daha reaktiftir. T – butildimetisilil ( TBDMS ) eterler ile triizopropilsilil ( TIPS ) eterlerden daha hzl reaksiyona girer . [9]

Doal tuzlar

Volkanik veya kömür atei fumarollerinde karlalan baz nadir mineraller, heksaflorosilik asit tuzlardr. Örnekler arasnda, iki polimorf olarak doal olarak oluan amonyum heksaflorosilikat bulunur: kriptohalit ve bararit. [11] [12] [13]

Güvenlik

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) ) buharlatnda hidrojen florür salabilir , bu nedenle benzer riskleri vardr. Buharlarn solunmas akcier ödemine neden olabilir . Hidrojen florür gibi cama ve ta eyalara saldrr . [14] LD 50 heksafluorosilisik asit deeri 430 mg / kg’dr. [15]

Amonyum florosilikat

Sodyum florosilikat

Potasyum florosilikat

H2SiF6 + 2 H2O → 6 HF + “SiO2”

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) çözeltilerinin alkali metal bazlarla nötralizasyonu, ilgili alkali metal florosilikat tuzlarn üretir:

(H3O) 2SiF6 + 2 NaOH → Na2SiF6 + 4 H2O

Elde edilen tuz Na2SiF6 esas olarak su floridasyonunda kullanlr. lgili amonyum ve baryum tuzlar, dier uygulamalar için benzer ekilde üretilir.

Nötr pH’a yakn, hekzaflorosilikat tuzlar bu denkleme göre hzla hidrolize olur: [8]

SiF2-

6 + 2 H2O → 6 F- + SiO2 + 4 H +

Kullanmlar

Heksaflorosilik Asit’in (Hekza Floro Silisik Asit, HEXAFLOROSLK AST, Heksaflüorosilik asit) büyük bir ksm alüminyum florür ve kriolite dönüür. [6] Bu malzemeler, alüminyum cevherinin alüminyum metale dönütürülmesinde merkezidir. Alüminyum triflorüre dönüüm u ekilde tanmlanr:

H2SiF6 + Al2O3 → 2 AlF3 + SiO2 + H2O HEKZA FLOROSLS AST; HEKZAFLOROSLKAST; HEKSA FLORASILIS AST; HEKSA FLOROSLS AST; heksaflorosilisasit; hekzaflorosilisacid; HEKZAFLOROSLSLK AST; hekzafulorosilicicacide; hekzafloroslyslicicaicde; hexaflorosilicicasit; hexaflorosilisikasit,

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) ayn zamanda Betts elektrolitik ileminde kurun rafine etmek için elektrolit olarak kullanlr.

Hekza Floro Silisik Asit (Hekza Floro Silisik Asit, HEKSAFLOROSLK AST, Heksaflüorosilik asit) (etikette hidroflorosilik asit olarak belirtilmitir), oksalik asit ile birlikte esasen çamar ekisi çeitleri olan Iron Out pas sökücü temizleme ürünlerinde kullanlan aktif maddelerdir.

Ni uygulamalar

H2SiF6, silil eterlerin Si-O balarn parçalamak için organik sentezde özel bir reaktiftir. Bu amaç için HF’den daha reaktiftir. T-butildimetisilil (TBDMS) eterler ile triizopropilsilil (TIPS) eterlerden daha hzl reaksiyona girer. [9]

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) ve tuzlar ahap koruyucu olarak kullanlmaktadr.

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) buharlatnda hidrojen florür aça çkarabildiinden benzer riskleri vardr. Buharlarn solunmas akcier ödemine neden olabilir. Hidrojen florür gibi cama ve ta eyaya saldrr. [11] Hexafluorosilicic Acid’in (Hekza Floro Silisik Asit, HEXAFLOROSLK AST, Heksaflüorosilik asit) LD50 deeri 430 mg / kg’dr. [12]

Moleküler Arlk 144.091 g / mol

Hidrojen Ba Donör Says 2

Hidrojen Ba Alcs Says 7

Fiziksel tanm

Florosilik asit, nüfuz eden keskin bir kokuya sahip renksiz, dumanl bir sv olarak görünür. Metaller ve dokular için andrcdr. Hem dumanlar hem de sv ile çok ksa temas iddetli ve arl yanklara neden olabilir. Su florlamasnda, çimento ve seramiklerin sertletirilmesinde ahap koruyucu olarak kullanlr.

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) Kaynama Noktas: 212 ° F, 760 mm Hg’de (su) yakl.

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) Erime Noktas: -4 ° F

Heksaflorosilik Asit Younluu (Hekza Floro Silisik Asit, HEXAFLOROSLK AST, Heksaflüorosilik asit): 77 ° F’de 1.3 (yaklak)

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) KULLANIMLARI

Yapmayan Yapmay önlemek için kullanlr

Antisetoff Spray tozu, basl kat yapraklar arasnda hava boluu oluturmak için kullanlr

Building_material naat sürecinde kullanlan döeme, yaltm, kalafat, fayans, ahap, cam vb. Malzemeler

Casting_agent Plastikler, kum veya metaller için döküm ajanlar veya kalplama bileikleri

Child_use Çocuklar için özel olarak tasarlanm ürünlerle ilgili (ör. Oyuncaklar, çocuk kozmetikleri, vb.)

Gübre Gübre Tüketici veya endüstriyel kullanm için ve gübre üretimi

Fluid_property_modulator Köpük önleyici maddeleri, phtlatrc maddeleri, dispersiyon maddelerini, emülgatörleri, yüzdürme maddelerini, köpürme maddelerini, viskozite ayarlayclar vb. çerir.

Food_contact Gda ambalaj, kat tabaklar, çatal bçak takm, kavurma makineleri gibi küçük aletleri içerir; gda üreten tesisleri içermez

malat, otomotiv Genel olarak otomobillerle veya bunlarn imalatyla ilgilidir, otomotiv_bakm veya otomotiv_ bileeni uygulanamadnda kullanlr (örn. Otomobil yakt, GPS birimleri) veya ayrntl bilgi bilinmediinde

Hekza Florosilik Asit (Hekza Floro Silisik Asit, HEXAFLOROSLK AST, Heksaflüorosilik asit) Sanayi Kullanmlar

– Tarm kimyasallar (böcek ilac olmayan)

– Korozyon inhibitörleri ve kireç önleyici maddeler

– Alev geciktiriciler

– Florlama ajan

– Oksitleyici / indirgeyici maddeler

– Kaplama ajanlar ve yüzey ilem ajanlar

– leme yardmclar, baka türlü listelenmemi

– Yüzey aktif maddeler

– Su Florlama

– Su Artma lemi ve dier çeitli kullanmlar

Genel Üretim Bilgileri

– naat

– Metalik olmayan mineral ürün imalat (kil, cam, çimento, beton, kireç, alç ve dier metalik olmayan mineral ürün imalatlarn içerir.

– Pestisit, gübre ve dier tarmsal kimyasal üretim hizmetleri

– Sabun, temizlik maddesi ve tuvalet hazrl imalat

– Araçlar

– Toptan ve perakende ticaret

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) Salk Tehlikesi

Buharn solunmas mukoza zar üzerinde ciddi andrc etki yaratr. Yutma, iddetli az ve mide yanklarna neden olur. Sv veya buharla temas, ciddi göz ve cilt yanklarna neden olur.

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) Yangn Tehlikesi

Yanma Ürünlerinin Özel Tehlikeleri: Yangnda tahri edici hidrojen florür dumanlar oluabilir.

Genel açklama hexafluoro silicic acid

Yüksek silisli floro silisik asitler hazrlanmtr. H2SiF6 ile temsil edilen bileime göre% 18’e kadar daha fazla miktarda ekstra silikaya sahiptirler. [3] Fluosilik asitin hazrlanmas ve özellikleri bildirilmitir. [4] Flüosilik asit, fosfat gübre endüstrisinin önemli bir yan ürünü olarak elde edilebilir. [7] Sodyum klorür ile nötralizasyon yoluyla sodyum florosilikat hazrlanmasnda kullanlabilir. [6] Ayrca amonyum florür ve silika üretmek için amonyakla nötralizasyona urayabilir. [7]

Görünüm Açk sar sv

Uygulama

Fluosilicic asit (FSA, H2SiF6) aadaki çalmalarda kullanlmtr:

• Florlu belediye su kaynaklarnn florlanmas.

• Kalsiyum karbonatn yüzey modifikasyonu.

• Silikann sv faz birikimi (LPD).

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) Hakknda

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit), metal üretimi gibi oksijene duyarl uygulamalarda kullanlmak üzere suda çözünmeyen bir silikon kaynadr. Son derece düük konsantrasyonlarda (ppm), florür bileikleri salk uygulamalarnda kullanlr. Florür bileikleri ayrca sentetik organik kimyada önemli kullanmlara sahiptir. Genellikle metal alam ve optik biriktirme için de kullanlrlar. Baz florür bileikleri nano ölçekte ve ultra yüksek saflkta formlarda üretilebilir. Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) genellikle çou ciltte hemen bulunur. Ultra yüksek saflkta ve yüksek saflkta bileimler, bilimsel standartlar olarak hem optik kaliteyi hem de kullanll gelitirir. Nano ölçekli element tozlar ve süspansiyonlar, alternatif yüksek yüzey alan formlar olarak düünülebilir. American Elements, uygulanabilir olduunda, Mil Spec (askeri snf) dahil olmak üzere birçok standart snfta üretim yapar; ACS, Reaktif ve Teknik Snf; Gda, Tarm ve laç Derecesi; Optik Snf, USP ve EP / BP (Avrupa Farmakopesi / ngiliz Farmakopesi) ve ilgili ASTM test standartlarn takip eder. Tipik ve özel paketleme mevcuttur. lgili ölçüm birimlerini dönütürmek için bir Referans Hesaplayc olduu gibi ek teknik, aratrma ve güvenlik (MSDS) bilgileri mevcuttur.

Açklama

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) bir tür inorganik asittir. Büyük ölçüde, di çürüü ve di floras vakalarn en aza indirmek için Birleik Devletlerde suyun florlanmas için kullanlmaktadr. Kimyasal sentez için, büyük ölçüde alüminyum florür ve kriyolitin yan sra birçok türde heksaflorosilikat tuzlarnn üretiminde kullanlr. Ayrca silikon ve silikon dioksit üretiminde de kullanlabilir. Kurunun rafine edilmesi için Betts elektrolitik ileminde bir elektrolit olarak da kullanlabilir. Ayrca silil eterlerin Si-O balarn parçalamak için organik sentezde özel bir reaktiftir.

Açklama

Hidroflorosilik asit olarak da bilinen fluosilisik asit H2SiF6, suda çözünebilen renksiz bir svdr. Oldukça andrc ve toksiktir, cam ve ta eyalara saldrr. Fluosilicic asit, su florlamasnda, elektrokaplamada ve emaye ve çimento üretiminde kullanlr.

Kimyasal özellikler

Florosilik asit effaf, renksiz bir dumanl svdr.

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) kullanr.

kanat ve ieleme tesisleri. Dier konsantrasyonlar, kurunun elektrolitik rafine edilmesinde, elektrolitik kaplamada, çimento sertletirme, ufalanan kireç veya tula ilerinde, tabaklama ilemi srasnda derilerden kirecin çkarlmas için, kereste koruyucu olarak kalplarn çkarlmas için kullanlr.

Genel Tanm Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit)

Nüfuz eden keskin bir kokuya sahip renksiz, dumanl bir sv. Metaller ve dokular için andrcdr. Hem dumanlar hem de sv ile çok ksa temas iddetli ve arl yanklara neden olabilir. Su florlamasnda, çimento ve seramiklerin sertletirilmesinde ahap koruyucu olarak kullanlr.

Hava ve Su Reaksiyonlar

Havada duman var. Is ve andrc dumanlarn aça çkmasyla suda çözünür.

Reaktivite Profili Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit)

Hazard Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit)

Deri temas ve solunmas halinde ar derecede andrcdr.

Salk tehlikesi

Buharn solunmas mukoza zar üzerinde ciddi andrc etki yaratr. Yutma, iddetli az ve mide yanklarna neden olur. Sv veya buharla temas, ciddi göz ve cilt yanklarna neden olur.

Yanma Ürünlerinin Özel Tehlikeleri: Yangnda tahri edici hidrojen florür dumanlar oluabilir.

Hexafluorosilicic Acid’in endüstriyel kullanmlar (Hekza Floro Silisik Asit, HEXAFLOROSLK AST, Heksaflüorosilik asit)

Hidroflorosilik asit (H2SiF6), renksiz ila açk kahverengi bir svdr. Ayrca kalsiyum florür veya dier florür içeren ürünlerden üretilir. Hidroflorosilik asit, bir dizi oksidik mineralin yüzdürülmesi srasnda birçok silikat için güçlü bir bastrcdr. Kalay, kolumbit ve tantalitin flotasyonu srasnda gang çökmesi için kullanlr.

Hexafluorosilicic Acid’in (Hekza Floro Silisik Asit, HEXAFLOROSLK AST, Heksaflüorosilik asit) Güvenlik Profili

(H3O) 2SiF6 + 2 NaOH → Na2SiF6 + 4 H2O

Elde edilen tuz Na2SiF6 esas olarak su floridasyonunda kullanlr. lgili amonyum ve baryum tuzlar, dier uygulamalar için benzer ekilde üretilir.

Nötr pH’a yakn, hekzaflorosilikat tuzlar bu denkleme göre hzla hidrolize olur: [8]

SiF2-6 + 2 H2O → 6 F- + SiO2 + 4 H +

Yaps

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) genel olarak heksaflorosilikat dianyonlar ile dengelenmi oksonyum iyonlar ve su içerdii varsaylr. Sulu çözeltide, hidronyum katyonu (H3O +) geleneksel olarak solvatl bir protonla eitlenir ve bu nedenle bu bileiin formülü genellikle H olarak yazlr.

2SiF6. Bu metafor geniletilerek, izole edilmi bileik H2SiF6 · 2H2O veya (H3O) 2SiF6 olarak yazlr. Durum kloroplatinik asit, floroborik asit ve heksaflorofosforik asit için olana benzer. Hekzaflorosilikat, oktahedral bir anyondur; Si – F ba mesafeleri 1,71 Å’dir. [3] Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) sadece ticari olarak çözelti olarak mevcuttur. [4]

Üretim ve temel reaksiyonlar

Emtia kimyasal hidrojen florür, floritten sülfürik asit ile ilenerek üretilir. [5] Bir yan ürün olarak, silika içeren mineral safszlklar içeren reaksiyonlar nedeniyle ton HF bana yaklak 50 kg (H3O) 2SiF6 üretilir. (H3O) 2SiF6 ayrca apatit ve florapatitten fosforik asit üretiminden bir yan ürün olarak üretilir. Yine, HF’nin bir ksm, silikon tetraflorür vermek için mineral besleme stounun kaçnlmaz bir bileeni olan silikat mineralleri ile reaksiyona girer. Bu ekilde oluan silikon tetraflorür, HF ile daha fazla reaksiyona girer. Net süreç u ekilde tanmlanabilir: [6]

SiO2 + 6 HF → SiF2-6 + 2 H3O +

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) ayrca silikon tetraflorürün hidroflorik asit ile ilenmesiyle de üretilebilir.

Suda, Hekza Floro Silisik Asit (Hekza Floro Silisik Asit, HEXAFLOROSLK AST, Heksaflüorosilik asit) hidroflorik aside ve çeitli ekillerde amorf ve hidratlanm silikaya (“SiO2”) kolayca hidrolize olur. Genellikle su floridasyonu için kullanlan konsantrasyonda,% 99 hidroliz meydana gelir ve pH düer. Hidroliz oran pH ile artar. çme suyunun pH’nda hidroliz derecesi esasen% 100’dür. [7]

H2SiF6 + 2 H2O → 6 HF + “SiO2”

(H3O) 2SiF6 + 2 NaOH → Na2SiF6 + 4 H2O

Elde edilen tuz Na2SiF6 esas olarak su floridasyonunda kullanlr. lgili amonyum ve baryum tuzlar, dier uygulamalar için benzer ekilde üretilir.

Nötr pH’a yakn, hekzaflorosilikat tuzlar bu denkleme göre hzla hidrolize olur: [8]

SiF2-

6 + 2 H2O → 6 F- + SiO2 + 4 H +

Kullanmlar

H2SiF6 + Al2O3 → 2 AlF3 + SiO2 + H2O

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) da çeitli faydal heksaflorosilikat tuzlarna dönütürülür. Potasyum tuzu, Potasyum florosilikat, porselen üretiminde, sertletirilmi betonlar için magnezyum tuzu ve böcek ilac olarak ve fosforlar için baryum tuzlarnda kullanlr.

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) ayn zamanda Betts elektrolitik ileminde kurun rafine etmek için elektrolit olarak kullanlr.

Hexafluorosilicic Acid’in ni uygulamalar (Hekza Floro Silisik Asit, HEXAFLOROSLK AST, Heksaflüorosilik asit)

H2SiF6, silil eterlerin Si – O balarn parçalamak için organik sentezde özel bir reaktiftir. Bu amaç için HF’den daha reaktiftir. T-butildimetisilil (TBDMS) eterler ile triizopropilsilil (TIPS) eterlerden daha hzl reaksiyona girer. [9]

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) ve tuzlar ahap koruyucu olarak kullanlmaktadr.

Doal tuzlar

Volkanik veya kömür atei fumarollerinde karlalan baz nadir mineraller, Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) tuzlardr. Örnekler arasnda iki polimorf olarak doal olarak oluan amonyum hekzaflorosilikat yer alr: kriptohalit ve bararit. [11] [12] [13]

Emniyet

Hekza Floro Silisik Asit (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Heksaflüorosilik asit) buharlatnda hidrojen florür aça çkarabildiinden benzer riskleri vardr. Buharlarn solunmas akcier ödemine neden olabilir. Hidrojen florür gibi cama ve ta eyaya saldrr. [14] Hexafluorosilicic Acid’in (Hekza Floro Silisik Asit, HEXAFLOROSLK AST, Heksaflüorosilik asit) LD50 deeri 430 mg / kg’dr.

Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID)

H2SiF6 + 2 H2O → 6 HF + “SiO2”

La neutralisation de solutions d’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) avec des bases de métaux alcalins produit les sels fluorosilicates de métaux alcalins correspondants:

(H3O) 2SiF6 + 2 NaOH → Na2SiF6 + 4 H2O

Le sel Na2SiF6 résultant est principalement utilisé dans la fluoration de l’eau. Les sels d’ammonium et de baryum apparentés sont produits de manière similaire pour d’autres applications.

À pH presque neutre, les sels d’hexafluorosilicate s’hydrolysent rapidement selon cette équation: [8]

SiF2-

6 + 2 H2O → 6 F- + SiO2 + 4 H +

Les usages

La majorité de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est convertie en fluorure d’aluminium et en cryolite. [6] Ces matériaux sont essentiels à la conversion du minerai d’aluminium en aluminium métallique. La conversion en trifluorure d’aluminium est décrite comme:

H2SiF6 + Al2O3 → 2 AlF3 + SiO2 + H2O HEKZA FLOROSILIS ACIDE; HEKZAFLOROSILICACID; ACIDE HEKSA FLORASILIS; HEKSA FLOROSILIS ASIT; heksaflorosilisasit; hekzaflorosilisacid; HEKZAFLOROSLSLC AST; hekzafulorosilicicacide; hekzafloroslyslicicaicde; hexaflorosilicicasit; hexaflorosilisikasit,

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est également utilisé comme électrolyte dans le procédé électrolytique Betts pour le raffinage du plomb.

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (identifié comme de l’acide fluorosilicique sur l’étiquette) ainsi que l’acide oxalique sont les ingrédients actifs utilisés dans les produits de nettoyage anti-rouille Iron Out, qui sont essentiellement des variétés de lessive aigre.

Applications de niche

H2SiF6 est un réactif spécialisé en synthèse organique pour cliver les liaisons Si-O des éthers silyliques. Il est plus réactif à cet effet que HF. Il réagit plus rapidement avec les éthers de t-butyldiméthysilyle (TBDMS) qu’avec les éthers de triisopropylsilyle (TIPS). [9]

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) et ses sels sont utilisés comme agents de préservation du bois. [10]

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) peut libérer du fluorure d’hydrogène lorsqu’il est évaporé, il présente donc des risques similaires. L’inhalation des vapeurs peut provoquer un œdème pulmonaire. Comme le fluorure d’hydrogène, il attaque le verre et le grès. [11] La valeur DL50 de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est de 430 mg / kg. [12]

Poids moléculaire 144,091 g / mol

Nombre de donneurs de liaison hydrogène 2

Nombre d’accepteurs de liaison hydrogène 7

Description physique

L’acide fluorosilicique se présente sous la forme d’un liquide fumant incolore avec une odeur piquante pénétrante. Corrosif pour les métaux et les tissus. Les vapeurs et le contact très court avec le liquide peuvent provoquer des brûlures graves et douloureuses. Utilisé dans la fluoration de l’eau, dans le durcissement du ciment et de la céramique, comme agent de préservation du bois.

Point d’ébullition de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit): 212 ° F à 760 mm Hg (eau) env.

Point de fusion de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit): -4 ° F

Densité de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit): 1,3 à 77 ° F (environ)

UTILISATIONS DE L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit), Heksaflüorosilik asit)

Antiadhésif utilisé pour empêcher l’adhérence

Antisetoff Spray poudre utilisée pour créer un espace d’air entre les feuilles de papier imprimées

Building_material Matériaux utilisés dans le processus de construction, tels que les revêtements de sol, l’isolation, le calfeutrage, les carreaux, le bois, le verre, etc.

Casting_agent Agents de coulée ou composés de moulage pour plastiques, sable ou métaux

Child_use Lié aux produits spécialement conçus pour les enfants (par exemple, jouets, cosmétiques pour enfants, etc.)

Engrais Engrais à usage grand public ou industriel et fabrication d’engrais

Fluid_property_modulator Comprend des agents antimousse, des agents coagulants, des agents de dispersion, des émulsifiants, des agents de flottation, des agents moussants, des ajusteurs de viscosité, etc.

Food_contact Comprend les emballages alimentaires, les assiettes en papier, les couverts, les petits appareils comme les torréfacteurs, etc. n’inclut pas les installations qui fabriquent des aliments

Industrie manufacturière, automobile Généralement lié aux automobiles ou à leur fabrication, utilisé lorsque l’automobile_care ou le Automotive_component ne sont pas applicables (par exemple, le carburant automobile, les unités GPS), ou les informations détaillées ne sont pas connues

Utilisations industrielles de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit)

– Produits chimiques agricoles (non pesticides)

– Inhibiteurs de corrosion et agents anti-tartre

– Ignifuges

– Agent fluorant

– Agents oxydants / réducteurs

– Agents de placage et agents de traitement de surface

– Auxiliaires technologiques, non répertoriés ailleurs

– Agents tensioactifs

– Fluoration de l’eau

– Traitement du traitement de l’eau et autres utilisations diverses

Informations générales sur la fabrication

– Construction

– Fabrication de produits minéraux non métalliques (comprend la fabrication d’argile, de verre, de ciment, de béton, de chaux, de gypse et d’autres produits minéraux non métalliques.

– Fabrication de pesticides, d’engrais et d’autres produits chimiques agricoles

– Fabrication de savons, de produits de nettoyage et de préparations pour toilettes

– Utilitaires

– Commerce de gros et de détail

Risque pour la santé de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

L’inhalation de vapeur produit un effet corrosif sévère sur la membrane muqueuse. L’ingestion provoque de graves brûlures de la bouche et de l’estomac. Le contact avec un liquide ou une vapeur provoque de graves brûlures aux yeux et à la peau.

Risque d’incendie de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Dangers particuliers des produits de combustion: Des vapeurs irritantes de fluorure d’hydrogène peuvent se former en cas d’incendie.

Description générale de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit)

Des acides fluorosiliciques à haute teneur en silice ont été préparés. Ils ont la quantité souhaitée de silice supplémentaire jusqu’à 18% de plus que la composition représentée par H2SiF6. [3] La préparation et les propriétés de l’acide fluosilicique ont été signalées. [4] L’acide fluosilicique peut être obtenu comme sous-produit majeur de l’industrie des engrais phosphatés. [7] Il peut être utilisé dans la préparation de fluorosilicate de sodium, par neutralisation avec du chlorure de sodium. [6] Il peut également subir une neutralisation avec de l’ammoniac pour produire du fluorure d’ammonium et de la silice. [7]

Aspect Liquide jaune clair

Application

L’acide fluosilicique (FSA, H2SiF6) a été utilisé dans les études suivantes:

• Fluoration des approvisionnements en eau municipaux fluorés.

• Modification de surface du carbonate de calcium.

• Dépôt en phase liquide (LPD) de silice.

À propos de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est une source de silicium insoluble dans l’eau à utiliser dans des applications sensibles à l’oxygène, telles que la production de métaux. À des concentrations extrêmement faibles (ppm), les composés fluorés sont utilisés dans les applications de santé. Les composés fluorés ont également des utilisations significatives en chimie organique synthétique. Ils sont également couramment utilisés pour allier le métal et pour le dépôt optique. Certains composés fluorés peuvent être produits à l’échelle nanométrique et sous des formes de très haute pureté. L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est généralement disponible immédiatement dans la plupart des volumes. Les compositions de très haute pureté et de haute pureté améliorent à la fois la qualité optique et l’utilité en tant que normes scientifiques. Des poudres et suspensions élémentaires à l’échelle nanométrique, en tant que formes alternatives à grande surface spécifique, peuvent être envisagées. American Elements produit à de nombreuses qualités standard le cas échéant, y compris Mil Spec (qualité militaire); ACS, réactif et qualité technique; Qualité alimentaire, agricole et pharmaceutique; Grade optique, USP et EP / BP (Pharmacopée européenne / Pharmacopée britannique) et suit les normes d’essai ASTM applicables. Des emballages typiques et personnalisés sont disponibles. Des informations supplémentaires techniques, de recherche et de sécurité (MSDS) sont disponibles, ainsi qu’un calculateur de référence pour la conversion des unités de mesure pertinentes.

La description

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est une sorte d’acide inorganique. Il est principalement utilisé pour la fluoration de l’eau aux États-Unis afin de minimiser l’incidence des caries dentaires et de la fluorose dentaire. Pour la synthèse chimique, il est principalement utilisé pour la fabrication de fluorure d’aluminium et de cryolite ainsi que de nombreux types de sels d’hexafluorosilicate. Il peut également être utilisé pour la production de silicium et de dioxyde de silicium. Il peut également être utilisé comme électrolyte dans le procédé électrolytique Betts pour le raffinage du plomb. C’est également un réactif spécialisé en synthèse organique pour cliver les liaisons Si-O des éthers silyliques.

L’acide fluosilicique, H2SiF6, également connu sous le nom d’acide fluorosilicique, est un liquide incolore soluble dans l’eau. Il est hautement corrosif et toxique, attaquant le verre et le grès. L’acide fluosilicique est utilisé dans la fluoration de l’eau, la galvanoplastie et dans la fabrication d’émaux et de ciment.

Propriétés chimiques

L’acide fluorosilicique est un liquide fumant transparent et incolore.

Utilise l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

établissements d’aile et d’embouteillage. D’autres concentrations sont utilisées dans le raffinage électrolytique du plomb, dans la galvanoplastie, pour le durcissement du ciment, la chaux en ruine ou la briqueterie, pour l’élimination de la chaux des peaux pendant le processus de tannage, pour éliminer les moisissures, comme agent de conservation du bois.

Description générale Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

Un liquide fumant incolore avec une odeur piquante pénétrante. Corrosif pour les métaux et les tissus. Les vapeurs et le contact très court avec le liquide peuvent provoquer des brûlures graves et douloureuses. Utilisé dans la fluoration de l’eau, dans le durcissement du ciment et de la céramique, comme agent de préservation du bois.

Réactions de l’air et de l’eau

Fumées dans l’air. Soluble dans l’eau avec dégagement de chaleur et de vapeurs corrosives.

Profil de réactivité Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit), Heksaflüorosilik asit)

Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) de danger (Hekza Floro Silisik Asit, Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit), Heksaflüorosilik asit)

Extrêmement corrosif par contact cutané et par inhalation.

Danger pour la santé

Dangers particuliers des produits de combustion: Des vapeurs irritantes de fluorure d’hydrogène peuvent se former en cas d’incendie.

Utilisations industrielles de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

L’acide hydrofluorosilicique (H2SiF6) est un liquide incolore à brun clair. Il est également fabriqué à partir de fluorure de calcium ou d’autres produits contenant du fluor. L’acide hydrofluorosilique est un puissant dépresseur pour de nombreux silicates pendant la flottation d’un certain nombre de minéraux oxydés. Il est utilisé pour la dépression de la gangue lors de la flottation de l’étain, de la colombite et de la tantalite.

Profil d’innocuité de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

(H3O) 2SiF6 + 2 NaOH → Na2SiF6 + 4 H2O

Le sel Na2SiF6 résultant est principalement utilisé dans la fluoration de l’eau. Les sels d’ammonium et de baryum apparentés sont produits de manière similaire pour d’autres applications.

À pH presque neutre, les sels d’hexafluorosilicate s’hydrolysent rapidement selon cette équation: [8]

SiF2-6 + 2 H2O → 6 F- + SiO2 + 4 H +

Les usages

L’acide hexafluorosilique est fabriqué sous forme de solution concentrée contenant une quantité importante d’acide fluorhydrique (HF) pour empêcher la dissociation et l’hydrolyse de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit). En milieu aqueux, l’acide hexafluorosilique se dissocie avec la formation de fluorure d’hydrogène:

La vitesse globale et la constante d’équilibre de la réaction globale seront influencées par le pH et la concentration, mais à un pH environnemental typique, la dissociation et l’hydrolyse de l’hexafluorosilicate en fluorure sont essentiellement de 100%.

H2SiF6 + Al2O3 → 2 AlF3 + SiO2 + H2O

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est également converti en une variété de sels d’hexafluorosilicate utiles. Le sel de potassium, le fluorosilicate de potassium, est utilisé dans la production de porcelaines, le sel de magnésium pour les bétons durcis et comme insecticide, et les sels de baryum pour les phosphores.

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est un composé inorganique avec la formule chimique H2SiF6 également écrite comme (H3O) 2 [SiF6]. Il s’agit d’un liquide incolore rencontré principalement sous forme de solution aqueuse diluée, à partir de là, la deuxième notation chimique a également été proposée. L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) a un goût acide distinctif et une odeur piquante. Il est produit naturellement à grande échelle dans les volcans. [1] [2] Il est fabriqué comme coproduit dans la production d’engrais phosphatés. L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) résultant est presque exclusivement consommé comme précurseur du trifluorure d’aluminium et de la cryolite synthétique, qui sont utilisés dans le traitement de l’aluminium. Les sels dérivés de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) sont appelés hexafluorosilicates.

Contenu

1 Structure

2 Production et principales réactions

3 utilisations

3.1 Applications de niche

4 sels naturels

5 Sécurité

6 Voir aussi

7 Références

Structure

On suppose généralement que l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est constitué d’une charge d’ions oxonium équilibrée par des dianions d’hexafluorosilicate ainsi que de l’eau. En solution aqueuse, le cation hydronium (H3O +) est traditionnellement assimilé à un proton solvaté, et en tant que tel, la formule de ce composé s’écrit souvent H

2SiF6. En prolongeant cette métaphore, le composé isolé s’écrit alors H2SiF6 · 2H2O, ou (H3O) 2SiF6.La situation est similaire à celle de l’acide chloroplatinique, de l’acide fluoroborique et de l’acide hexafluorophosphorique. L’hexafluorosilicate est un anion octaédrique; les distances des liaisons Si – F sont de 1,71 Å. [3] L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) n’est disponible dans le commerce que sous forme de solution. [4]

Production et principales réactions

Le fluorure d’hydrogène, produit chimique de base, est produit à partir de fluorite par traitement avec de l’acide sulfurique. [5] En tant que sous-produit, environ 50 kg de (H3O) 2SiF6 sont produits par tonne de HF en raison de réactions impliquant des impuretés minérales contenant de la silice. Le (H3O) 2SiF6 est également produit comme sous-produit de la production d’acide phosphorique à partir d’apatite et de fluorapatite. Là encore, une partie du HF réagit à son tour avec les minéraux silicatés, qui sont un constituant inévitable de la charge minérale, pour donner du tétrafluorure de silicium. Ainsi formé, le tétrafluorure de silicium réagit encore avec HF. Le processus net peut être décrit comme suit: [6]

SiO2 + 6 HF → SiF2-6 + 2 H3O +

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) peut également être produit en traitant le tétrafluorure de silicium avec de l’acide fluorhydrique.

Dans l’eau, l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) s’hydrolyse facilement en acide fluorhydrique et en diverses formes de silice amorphe et hydratée («SiO2»). À la concentration habituellement utilisée pour la fluoration de l’eau, une hydrolyse à 99% se produit et le pH chute. Le taux d’hydrolyse augmente avec le pH. Au pH de l’eau potable, le degré d’hydrolyse est essentiellement de 100%.

H2SiF6 + 2 H2O → 6 HF + “SiO2”

(H3O) 2SiF6 + 2 NaOH → Na2SiF6 + 4 H2O

Le sel Na2SiF6 résultant est principalement utilisé dans la fluoration de l’eau. Les sels d’ammonium et de baryum apparentés sont produits de manière similaire pour d’autres applications.

À pH presque neutre, les sels d’hexafluorosilicate s’hydrolysent rapidement selon cette équation: [8]

SiF2-

6 + 2 H2O → 6 F- + SiO2 + 4 H +

Les usages

H2SiF6 + Al2O3 → 2 AlF3 + SiO2 + H2O

Applications de niche de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit)

H2SiF6 est un réactif spécialisé en synthèse organique pour cliver les liaisons Si – O des éthers silyliques. Il est plus réactif à cet effet que HF. Il réagit plus rapidement avec les éthers de t-butyldiméthysilyle (TBDMS) qu’avec les éthers de triisopropylsilyle (TIPS). [9]

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) et les sels sont utilisés comme agents de préservation du bois.

Sels naturels

Certains minéraux rares, rencontrés dans les fumerolles volcaniques ou de charbon, sont des sels de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) (Hekza Floro Silisik Asit, HEXAFLUOROSILICIC ACID, Heksaflüorosilik asit). Les exemples incluent l’hexafluorosilicate d’ammonium qui se présente naturellement sous forme de deux polymorphes: la cryptohalite et la bararite.

sécurité

L’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) peut libérer du fluorure d’hydrogène lorsqu’il est évaporé, il présente donc des risques similaires. L’inhalation des vapeurs peut provoquer un œdème pulmonaire. Comme le fluorure d’hydrogène, il attaque le verre et le grès. [14] La valeur DL50 de l’Acide Hexafluorosilicique (HEXAFLUOROSILICIC ACID, Hexafluorosilicic Acid, Hekza Floro Silisik Asit, Heksaflüorosilik asit) est de 430 mg / kg.

HEXAFLUOROSILICIC ACID (Hekza Floro Silisik Asit)

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