SODIUM MOLYBDATE

Synonym: Molybdic acid sodium salt dihydrate

CAS Number: 10102-40-6

Linear Formula: Na2MoO4 · 2H2O

Molecular Weight: 241.95

EC Number: 231-551-7

Sodium Molybdenum Oxide Dihydrate, Disodium molybdate dihydrate, Molybdic acid sodium salt dihydrate, Sodium molybdate(VI) dihydrate, Sodium dioxido(dioxo)molybdenum hydrate (2:1:2)

Sodium molybdate, Na2MoO4, is useful as a source of molybdenum.

It is often found as the dihydrate, Na2MoO4·2H2O.

The molybdate(VI) anion is tetrahedral. Two sodium cations coordinate with every one anion.

Sodium molybdate was first synthesized by the method of hydration.

A more convenient synthesis is done by dissolving MoO3 in sodium hydroxide at 50–70 °C and crystallizing the filtered product.

The anhydrous salt is prepared by heating to 100 °C.

disodium dioxido-dioxomolybdenum

disodium molybdate

disodium;dioxido(dioxo)molybdenum

molybdic acid (H2MoO4) , disodium salt

molybdic acid disodium salt

molybdic acid, disodium salt

sodium molybdate(VII) dihydrate

Uses

The agriculture industry uses 1 million pounds per year as a fertilizer.

In particular, its use has been suggested for treatment of whiptail in broccoli and cauliflower in molybdenum-deficient soils.

However, care must be taken because at a level of 0.3 ppm sodium molybdate can cause copper deficiencies in animals, particularly cattle.

Sodium Molybdate is a crystalline powder essential for the metabolism and development of plants and animals as a cofactor for enzymes. (NCI)

It is used in industry for corrosion inhibition, as it is a non-oxidizing anodic inhibitor.

The addition of sodium molybdate significantly reduces the nitrite requirement of fluids inhibited with nitrite-amine, and improves the corrosion protection of carboxylate salt fluids.

In industrial water treatment applications where galvanic corrosion is a potential due to bimetallic construction, the application of sodium molybdate is preferred over sodium nitrite.

Sodium molybdate has the advantage in that the dosing of lower ppm’s of molybdate allow for lower conductivity of the circulating water.

Sodium molybdate at levels of 50-100 ppm offer the same levels of corrosion inhibition that sodium nitrite at levels of 800+ ppm.

By utilizing lower concentrations of sodium molybdate, conductivity is kept at a minimum and thus galvanic corrosion potentials are decreased Molybdenum chemicals are a specialty raw material that is widely used in the agricultural, lubricant, pigment & dye, and water treatment industries.

In water treatment, sodium molybdate (Na2MoO4) has proven to be a superior corrosion inhibitor in open recirculating cooling systems and closed recirculating cooling systems.

It is often applied at lower levels and in combination with other inhibitors, such as inorganic and organic phosphates.

In addition to being a very effective inhibitor in both soft and hard water, molybdates are thermally stable and are also excellent passivators in the presence of oxygen.

Furthermore, molybdate treatments are safer for the environment, and may be most appropriate where phosphate and/or zinc discharge is limited.

In industrial water treatment applications, sodium molybdate offers the best corrosion protection in systems of bimetallic construction versus sodium nitrite.

In these mixed-metallurgy cooling systems, there is a high potential for galvanic corrosion.

Sodium molybdate provides an advantage over using sodium nitrite because it is dosed at lower ppm(s), and this allows for lower conductivity of the circulating water.

Because of the lower conductivity levels in the cooling water, the potential for galvanic corrosion is greatly decreased.

(Sodium Molybdate at levels of 50 – 100 ppm offers the same level of corrosion inhibition that sodium nitrite does at levels of 800+ ppm.)

Safety

Sodium molybdate is incompatible with alkali metals, most common metals and oxidizing agents.

It will explode on contact with molten magnesium. It will violently react with interhalogens (e.g., bromine pentafluoride; chlorine trifluoride).

Its reaction with hot sodium, potassium or lithium is incandescent

Sodium Molybdate Dihydrate is generally immediately available in most volumes.

Hydrate or anhydrous forms may be purchased. High purity, submicron and nanopowder forms may be considered.

ATAMAN sells 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.

Sodium molybdate corrosion inhibitor for boiler feedwater systems:

Molybdate-containing corrosion inhibotors are becoming more attractive in an increasing number of commercial applications.

Sodium molybdate inhibits corrosion of low carbon steel, copper and brass in recirculating cooling water systems while being environmentally safe.

These compounds are also economical at the concentration required for effective water treatment.

Molybdenum is tolerated in various concentrations by many life forms.

Molybdenum compounds are characterized as nontoxic in US Public Health Bulletin 293, by the Federal Hazardous Substances Labeling Act, and by the Occupational Safety and Health Act.

The nature of molybdate inhibition was discussed. Molybdate inhibits by adsorption. This necessitates the use of more molybdate to protect steel in typical waters than is required for protection in distilled water.

Sodium molybdate inhibition has been investigated in waters of varying composition and pH.

Several multi-component inhibitor systems which contained sodium molybdate were studied.

Several advantages of molybdates beyond general ferrous metals corrosion inhibition can be shown which have important commercial implications.

These include inhibitions of pit propagation, and of crevice and nonferrous metals corrosion.

The effect of sodium molybdate on the corrosion inhibition of copper was studied in soft water.

Potentiodynamic polarization experiments were performed with aluminum in deaerated high chloride and high chloride + sodium molybdate solutions.

The ability of a single chemical to inhibit the corrosion of more than one metal has important advantages in water treatment.

Sodium molybdate is an important source of molybdenum and mostly occurs as sodium molybdate dehydrate.

Its chemical formula is Na2MoO4. The molybdate anion is tetrahedral.Two sodium cations coordinate for each anion.

Sodium Molybdate (Sodium Molybdate Dihydrate) is widely used in manufacturing, including agricultural fertilizers, pigments, catalysts, fire retardants, corrosion inhibitors, as well as water treatment.

Sodium Molybdate is widely used in manufacturing, including agricultural fertilizers, pigments, catalysts, fire retardants, corrosion inhibitors, as well as water treatment.

It is an essential micronutrient for plants and animals.

It is commonly used for hydroponics and leguminous plants, such as peas, beans, lentils, alfalfa, and peanuts.

Sodium Molybdate improves the uptake of nitrogen and promotes efficient fixing of atmospheric nitrogen by bacteria.

Sodium Molybdate is used in water treatment, including industrial water treatment due to its low toxicity.

The advantage of Sodium Molybdate in water treatment is that it is effective in low dosages, which maintains low conductivity of water and prevents corrosion by reducing galvanic corrosion potentials.

It is also used for metal surface treatment, including galvanizing and polishing.

Sodium Molybdate dihydrate, also known as disodium molybdate is an odourless white, crystalline powder with the chemical formula Na2MoO4.

Manufactured from pure molybdenum ore this product is of an extremely high quality.

Sodium Molybdate is widely used in the water treatment industry as a corrosion inhibitor in water treatment products.

It is also used in agriculture as a micronutrient for plants and used in the manufacturing process of pigments, lubricants and an additive for metal finishing.

Sodium Molybdate as a corrosion inhibitor

Sodium Molybdate is an ideal environmentally responsible corrosion inhibitor for water and cooling systems.

Capable of working across a variety of temperatures and pH levels, sodium molybdate experiences no loss of chemical properties or effectiveness in a variety of hot or cold environments.

When used, it is capable of inhibiting the corrosion of ferrous, copper and aluminium metals in the cooling water of both open and closed cooling systems.

Sodium Molybdate in Agriculture

Sodium molybdate offers a useful source of molybdenum which is an excellent soil micronutrient and essential for healthy plant growth making it a popular choice of fertiliser within the agricultural industry.

Suitable for foliar or fertigation applications, it is used in small amounts to supply molybdenum to crops and livestock.

Sodium molybdate is also added to cattle feed when treating copper deficiencies.

PRODUCTION

Sodium molybdate was first produced by hydration process.

It can be produced by dissolving molybdenum trioxide in sodium hydroxide within a temperature range of 50-70°C and then crystallizing the filtered product.

The final anhydrous product is obtained by heating it to 100°C.

MoO3 + 2NaOH + H2O → Na2MoO4·2H2O

The above reaction illustrates the production reaction, where molybdenum trioxide reacts with sodium hydroxide to produce sodium molybdate along with water.

USES

WATER TREATMENT

Sodium molybdate is preferred over sodium nitrite in the industrial water treatment process, where there is a potential of galvanic corrosion owing to its bimetallic construction.

It facilitates lower conductivity in the coursing water when the dosage is in lower ppm’s of molybdate.

Sodium molybdate can offer consumption restraint, within the range of 50-100 ppm. Whereas, sodium nitrate would have to be at levels of 800 ppm to offer the same consumption restraint.

The lower concentrations of sodium molybdate would maintain low conductivity and therefore the potentials of galvanic consumption are diminished.

AGRICULTURE

The agriculture industry uses nearly half a million kilograms of sodium molybdate as fertilizer annually.

It is important for the conversion of nitrates present in leaves to proteins and amino acids.

Molybdenum is essential for the optimum growth of leguminous plants.

This chemical is used to treat whiptail disorder in plants such as broccoli and cauliflower, which occurs due to the deficiency of molybdenum in the soil.

Its dosage must be within limits, which otherwise would lead to copper deficiencies in animals.

CHEMICALS TRACER

Sodium molybdate finds applications in medicinal chemistry and biochemistry.

It is used to track numerous natural organic chemicals, which are colorless post chromatographical analysis, where it stains blue.

The blue color is known as molybdenum blue.

CORROSION INHIBITION

Sodium molybdate is a non-oxidizing anodic inhibitor and therefore used in corrosion inhibition.

This chemical reduces the requirement of nitrate by fluids inhibited with nitrite amine and subsequently enhances the corrosion security of carboxylate salt fluids.

PRECAUTIONS

Sodium molybdate is not compatible with oxidizing agents, alkali metals and many normal metals.

This chemical could blast, when coming in contact with liquid magnesium.

It violently reacts with interhalogens such as bromine pentafluoride and chlorine trifluoride.

Sodium molybdate results in incandescent reactions when treated with hot lithium, sodium or potassium.

Sodium molybdate

Disodium molybdate

CAS Number

7631-95-0

10102-40-6 (dihydrate)

Chemical formula: Na2MoO4

Molar mass: 205.92 g/mol (anhydrous)

241.95 g/mol (dihydrate)

Appearance: White powder

Density 3.78 g/cm3, solid

Melting point: 687 °C (1,269 °F; 960 K)

Solubility in water: 84 g/100 ml (100 °C)

Refractive index (nD): 1.714

Sodium molybdate [Wiki]

12680-49-8 [RN]

231-551-7 [EINECS]

7631-95-0 [RN]

Dinatriumdioxido(dioxo)molybdaen [German] [ACD/IUPAC Name]

Dioxo(dioxydo)molybdène de disodium [French] [ACD/IUPAC Name]

Disodium dioxido(dioxo)molybdenum [ACD/IUPAC Name]

Molybdenum, diolatodioxo-, sodium salt (1:2) [ACD/Index Name]

sodium molybdate (anhydrous)

Sodium Molybdate, anhydrous

[7631-95-0]

10102-40-6 [RN]

106463-33-6 [RN]

14666-91-2 [RN]

231-107-2 [EINECS]

disodium diketo-dioxido-molybdenum

disodium dioxido-dioxomolybdenum

disodium dioxido-dioxo-molybdenum

Disodium molybdate

disodium tetraoxomolybdate

disodium;dioxido(dioxo)molybdenum

EINECS 231-551-7

Molybdate (MoO42-), disodium, (T-4)-

Molybdate (MoO42-), disodium, (β-4)-

Molybdate disodium

Molybdic acid (H2MoO4) , disodium salt

Molybdic acid (H2MoO4), disodium salt (8CI)

MOLYBDIC ACID DISODIUM SALT

Molybdic acid, disodium salt

Na2MoO4

Natriummolybdat [German]

Natriummolybdat

Natriummolybdat [German]

sodium dioxido(dioxo)molybdenum

sodium molybdate (anh.)

Sodium molybdate (Na2MoO4)

Sodium molybdate (VAN)

Sodium Molybdate 35% Solution

Sodium Molybdate ACS

Sodium Molybdate Anhydrous

Sodium Molybdate Crystals, Technical Grade

Sodium molybdate dihydrate

Sodium Molybdate Dihydrate (Technical Grade)

Sodium Molybdate Solution 35%

Sodium molybdate(VI)

Sodium Molybdate, ACS Grade

sodium orthomolybdate

sodiummolybdate

Sodium molybdate

Disodium molybdate

7631-95-0

Sodium molybdate(VI)

Molybdate disodium

Natriummolybdat

sodium molybdenum oxide

Molybdic acid, disodium salt

Natriummolybdat [German]

Sodium molybdate (VAN)

Sodium molybdate (Na2MoO4)

UNII-948QAQ08I1

CCRIS 5442

EINECS 231-551-7

NSC 77389

sodium molybdate (anhydrous)

Molybdic acid (H2MoO4) , disodium salt

Molybdate (MoO42-), disodium, (T-4)-

disodium;dioxido(dioxo)molybdenum

948QAQ08I1

13466-16-5

Molybdate (MoO42-), disodium, (beta-4)-

Sodium dimolybdate

Na2MoO4

Sodium Molybdate Anhydrous

MoNa2O4

Molybdic acid (H2MoO4), disodium salt

Molybdenum (as sodium)

Anhydric sodium molybdate

disodium tetraoxomolybdate

sodium molybdate (anh.)

Molybdic acid, sodium salt

EC 231-551-7

Sodium Molybdate, anhydrous

Sodium molybdate, >=98%

Ddisodium Molybdate Dihydrate

Sodium Molybdate, ACS Grade

Molybdate (MoO42-), sodium (1:2), (T-4)-

sodium dioxido(dioxo)molybdenum

Sodium Molybdate 35% Solution

Sodium Molybdate Solution 35%

Sodium molybdate, LR, >=99.5%

Sodium Molybdate Crystals, Technical Grade

Sodium Molybdate Dihydrate (Technical Grade)

Molybdic acid (H2MoO4), disodium salt (8CI)

Sodium molybdate, anhydrous, powder, -100 mesh particle size, 99.9% trace metals basis

Other Names

Molybdic acid (H2MoO4), disodium salt, dihydrate

Molybdate (MoO42-), disodium, dihydrate, (T-4)-

Sodium Molybdate Anhydrous

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Sodium Molybdate, Anhydrous

Sodium Molybdate

Ammonium Molybdate Solution

Barium Europium Calcium Molybdate

Copper Molybdate Sputtering Target

Ammonium Heptamolybdate

Ammonium Octamolybdate

Corrosion Inhibitors are used in both open & closed recirculating cooling water treatment products.

Benzotriazole (BZT) is a similar, but less common inhibitor. Sodium Molybdate is also used in cooling water treatment as a corrosion inhibitor.

Molybdenum is used both as an inhibitor and as a trace chemical to monitor dosage measurements due to its yellow color.

Sodium Nitrite is another common metal corrosion inhibitor for iron & steel and is typically used in closed-loop cooling water treatment products, such as chiller systems.

(Other allied products which accompany these products are borates which act as buffers/stabilizers and have general cleaning attributes as well.)

Corrosion Inhibition:

CORROSION INHIBITION –

In 1939, two patents first described the use of readily soluble sodium, potassium, and ammonium molybdates as corrosion inhibitors for motor vehicle engine coolants.

These and other inorganic molybdates are now among the most popular corrosion inhibitors because of their favorable properties and behavior.

Molybdate is an anodicinhibitor, i.e. it inhibits by increasing the polarization of the anode component of the metal corrosion cell.

Basically, Molybdate forms a transparent passivating film that inhibits the corrosion of ferrous, aluminum, and cupreous metals over a wider pH range than any other inhibitor apart from chromate.

It does this by precipitating escaping metal cations as molybdate species to block anodic sites and strengthen developing metal oxide films.

Furthermore, molybdate does not lose it’s chemical properties and effectiveness when it encounters ‘hot spots’ or increased temperatures; nor does molybdate breakdown in chlorinated systems or when chlorine is used as a biocide like other inhibitors (e.g. Belcor 575).

Molybdates are seldom used alone because the concentration level required for effective corrosion retardation make it commercially unattractive (e.g. 250 mg/L) – as with other anodically active inhibitors, molybdate efficacy is improved and its concentration requirement significantly reduced when it is combined with other synergistic chemicals.

Among the best known of these synergists are amines (e.g. Cyclohexylamine, DEAE), phosphonates (e.g. HEDP, PBTC), azoles (e.g. tolyltriazole, benzotriazole), and soluble zinc salts (e.g. zinc sulfate).

The largest consumption of molybdates for corrosion inhibition is in the treatment of cooling water in open and closed cooling systems

Commercial water treatment programs commonly employ molybdate with as many as four or five other components to inhibit and/or control corrosion, algae & microorganism growth, pH regulation, and scale or solids dispersion.

A typical formulation of a copper corrosion inhibition treatment that has retarded corrosion to a rate of 0.021 mils/yr. follows:

Sodium tolyltriazole 50% solution 1 mg/L

Sodium molybdate dihydrate 5 mg/L

HEDP 3 mg/L

Zinc sulfate 2 mg/L

Other products and processes which utilize molybdates include hydraulic & metalworking fluids, temporary rust-preventive coatings, pitting inhibitor for stainless steels in mineral acids, passivation treatments for galvanized zinc and tin plate, rinses for phosphate conversion coating, aluminum anodizing processes, hot forging lubricants, boiler waters, engine coolants, as well as many others

A shiny grey metal, which looks quite a lot like steel, molybdenum has been around in nature since time immemorial, however because of its limited occurrence, it has always been considered extremely valuable.

Molybdenum has been used widely as an alloying element as well as a metallic coating.

The oxides of moly find usage in several industries, including petrochemical, water and chemical treatment.

Moly compounds and their usages:

Molybdenum disulphide, or Molybdenite, is a naturally occurring ore and molybdates are chemical products that are made from this ore.

The formulation is done by swapping out the sulphur atoms with oxygen ones and this leads to the formation of molybdic acid or pure molybdic oxide.

Depending on what base is being used and under what conditions the basification is being done, multiple molybdates can be produced and the most common ones include pure molybdic oxide, sodium molybdate dihydrate and ammonium dimolybdate.

Molybdic oxide finds several uses – as a component in certain types of steel, for the manufacture of other moly compounds and most importantly, as a chemical in water treatment facilities in the form of corrosion inhibitor formulations.

It can help prevent corrosion on steel and aluminium and in places where the water needs to be heated, such as in boilers and water heating systems, sodium molybdate is most commonly used. Other uses include temporary coatings against rusting, pitting inhibitors for stainless steels, hydraulic and metalwork fluids, in rinses for phosphate conversion coating and aluminium anodizing processes.

Usage of molybdates as corrosion inhibitors:

The earliest patents related to the usage of molybdates as corrosion inhibitors, date all the way back to 1939, wherein they were considered as appropriate for coolants for motor engine vehicles. Recent studies have proven that molybdate is an anodic inhibitor – this means that it inhibits the anode component in the cells that causes corrosion, by increasing the polarization.

In simple terms, the molybdate when used under the correct circumstances forms a protective layer, which inhibits the corrosion caused due to aluminium, ferrous and cuprous metals.

More importantly, molybdates do not lose any of their chemical properties or efficacy, when they encounter elevated temperatures or breakdown in systems that have chlorine in them.

Perhaps the biggest advantage of using molybdates is that very low concentration levels are required to be considered effective corrosion inhibitors.

The most common usage of molybdates for corrosion inhibition is in open and closed water cooling systems.

In a typical commercial treatment program, there could be four to five other compounds being used with the molybdate, as it will be the combination that will ward off corrosion, regulate pH levels, control the growth of algae or other microorganisms.

Moving onto why molybdenum compounds are used in water treatment chemicals:

Most large scale commercial complexes, such as office buildings, hospitals and other such commercial institutions will utilise some version of a cooling tower.

The heat that is generated through the HVAC systems in the building needs to be dispelled and this takes place through the cooling towers and the process of evaporation.

When evaporation happens, there is a concentration of mineral salts and then solubility levels of these salts hit saturation point, they will start to form scales.

The water in the cooling towers can be recycled several times, however there is always the need for certain chemicals, because with water, there is always the chance of corrosion and fungal or microbial build-up.

Some of the most commonly used chemical products for corrosion inhibition include nitrite, borate and silicate and phosphoric acid for scale inhibition.

The use of sodium molybdate for closed water systems has been a long accepted practice and it is able to not only prevent corrosion, but also assist in the elongation of cooling tower lifecycles.

Sodium molybdate inhibits the corrosion of low carbon steel, copper as well as brass in cooling water systems, which function on a recirculating basis and are environmentally safe.

Previously, it was chromate that was used, however, when chromate was found to be toxic, it was banned, spurring the increased usage of molybdenum.

Not only do these molybdate compounds have several commercial applications, they are also considered the most economical when taken in reference to water treatment; what makes it the most appropriate choice is the fact that molybdenum is safe and non-toxic for humans, in most forms.

Studies and trials have shown that sodium molybdate’s efficacy might be altered depending on the water composition and other water treatment chemicals being used.

WHAT ARE THE USES OF MOLYBDIC OXIDE AND MOLYBDATES?

Molybdic oxide is used as a component of some types of steel, as a water treatment chemical and also as a reagent for the manufacture of other molybdenum compounds.

The primary function of molybdic oxide as a component in steel and as a water treatment chemicals is the prevention of corrosion.

Molybdates are also very good corrosion inhibitors for steel and aluminium and these products are also used in water treatment applications.

In particular, sodium molybdate is often used in boiler and heating system water treatment chemical formulations.

Another use of sodium molybdates is a bioavailable source of molybdenum, particularly in the formulation of fertilisers for leguminous crops.

Ammonium molybdates are also sometimes used as corrosion inhibitors and sometimes used as a bioavailable source of molybdenum.

These materials are also used in catalysis in industrial chemical manufacture.

Proprietary Molybdate Based Corrosion Inhibitors

Proprietary molybdate based corrosion inhibitors usually consist of an aqueous solution of sodium molybdate, a pH buffer, possibly a dispersing agent, and an azole.

These inhibitors must not be added to a system that is used for direct/indirect heating/cooling of a potable water system.

Corrosion protection is provided by a protective “barrier” film that is formed by a chemical reaction between molybdate and iron.

Therefore, initially the iron surface must be reasonably clean and free of corrosion products.

Molybdate based corrosion inhibitors are easy to test, and they provide excellent corrosion protection irrespective of the amount of air ingression into the system & are economical to use when the make-up rate is low.

However, if the make-up is excessive or continuous, the hardness that is introduced into the system will precipitate the molybdate, thus resulting in increased inhibitor demand and corrosion of the iron material in the system.

Also, because the molybdenum concentration in the total waste water that is discharged to the sanitary sewer system must be less than the maximum limit of 5 mg/l Mo indicated in the

Water Treatment Program Environmental Guideline, molybdate based corrosion inhibitors have a high environmental impact.

Typically, a molybdenum concentration of 50-150 ppm Mo is maintained in the system, and the pH & TDS levels are maintained within their respective ranges of 9.0-10.5 & 2500 micromhos/cm maximum.

Sodium molybdate

CAS Number: 7631-95-0

Synonyms:

Molibdik asit disodyum tuzu.;Sodium molybdate dihydrate;monosodium molybdate(VI);Na2MoO4;sodium molybdate;sodium molybdate(VI);sodium molybdate(VI), 99Mo-labeled cpd;sodium molybdate(VI), dihydrate,sodium molybdenum oxide;Sodium molybdate;Disodium molybdate;Sodium molybdate(VI);7631-95-0;Natriummolybdat;Molybdic acid, disodium salt;Molybdate disodium;Natriummolybdat [German];Sodium molybdate (VAN);Sodium molybdate (Na2MoO4);UNII-948QAQ08I1;CCRIS 5442;Molybdate (MoO42-), disodium, (T-4)-;EINECS 231-551-7;NSC 77389;Sodium Molybdate, anhydrous;Molybdic acid (H2MoO4), disodium salt;Molybdic acid (H2MoO4) , disodium salt;disodium dioxido(dioxo)molybdenum;Molybdate (MoO42-), disodium, (beta-4)-;Molybdate (MoO42-), sodium (1:2), (T-4)-;MFCD00003486;Sodium dimolybdate;Na2MoO4;sodium orthomolybdate;Sodium Molybdate ACS;MoNa2O4;disodium tetraoxomolybdate;;sodium molybdate (anh.);AC1Q1UPT;Sodium Molybdate Anhydrous;Molybdate (MoO42#-), disodium, (T -4)-;Molybdic acid, sodium salt;AC1L1V7F;AC1N9EV1;Sodium molybdate, >=98%;sodium molybdate (anhydrous);Ddisodium Molybdate Dihydrate;Sodium Molybdate, ACS Grade;sodium dioxido(dioxo)molybdenum;disodium dioxido-dioxomolybdenum;Sodium Molybdate 35% Solution;Sodium Molybdate Solution 35%;DTXSID2052788;CHEBI:75215;10102-40-6 (dihydrate);948QAQ08I1;Sodium molybdate, anhydrous 100g;Sodium molybdate, LR, >=99.5%;AKOS015912969;RL04907;Sodium molybdate dihydrate, 98% 100g;13466-16-5;AN-21799;IN001993;IN009895;IN018732;LS-91592;Sodium Molybdate Crystals, Technical Grade;12680-49-8 (cpd with unspecified MF);FT-0655712;Sodium Molybdate Dihydrate (Technical Grade);Molybdate (MoO42-), disodium, ( beta-4)-;C15455;Molybdic acid (H2MoO4), disodium salt (8CI);Sodium molybdenum oxide, anhydrous, Mo 46.2%;I14-4724;Sodium molybdate, anhydrous, powder, -100 mesh particle size, 99.9% trace metals basis;106463-33-6;14666-91-2;Sodium molybdate dihydrate;10102-40-6;Sodium molybdate(VI) dihydrate;Disodium molybdate dihydrate;UNII-8F2SXI1704;Na2MoO4.2H2O;8F2SXI1704;Molybdic acid sodium salt dihydrate;MFCD00149170;Molybdic acid, disodium salt, dihydrate;Sodium molybdate 2 hydrate;disodium dihydrate molybdate;dipotassium dihydrate molybdate;sodium orthomolybdate dihydrate;Molybdate (MoO42-), disodium, dihydrate, (T-4)-;DTXSID7051505;CHEBI:75213;Sodium Molybdate (VI) Dihydrate;Sodium molybdenum oxide dihydrate;MolPort-019-989-728;Sodium Molybdate (VI), Dihydrate;AKOS022186490;AK144803;IN000935;disodium dioxido(dioxo)molybdenum dihydrate;ST24049280;sodium dioxido(dioxo)molybdenum–water (1/2);A800316;iaEa AAENI paragraph signthornE(R) masculineIIi;disodium bis(oxidanidyl)-bis(oxidanylidene)molybdenum dihydrate;Sodium molybdate [Wiki];Dinatriumdioxido(dioxo)molybdaen [German] [ACD/IUPAC Name];Dioxo(dioxydo)molybdène de disodium [French] [ACD/IUPAC Name];Disodium dioxido(dioxo)molybdenum [ACD/IUPAC Name];Molybdenum, diolatodioxo-, sodium salt (1:2) [ACD/Index Name];sodium molybdate (anhydrous);[7631-95-0];10102-40-6 [RN];106463-33-6 [RN];12680-49-8 [RN];14666-91-2 [RN];231-107-2 [EINECS];231-551-7 [EINECS],7631-95-0 [RN];disodium diketo-dioxido-molybdenum;disodium dioxido-dioxomolybdenum;disodium dioxido-dioxo-molybdenum;Disodium molybdate;disodium tetraoxomolybdate;disodium;dioxido(dioxo)molybdenum;EINECS 231-551-7;MFCD00003486;Molybdate (MoO42-), disodium, (T-4)-;Molybdate (MoO42-), disodium, (ß-4)-;Molybdate disodium;Molybdic acid (H2MoO4) , disodium salt;Molybdic acid (H2MoO4), disodium salt (8CI);MOLYBDIC ACID DISODIUM SALT;Molybdic acid, disodium salt;Na2MoO4;Natriummolybdat [German];Natriummolybdat;Natriummolybdat [German];sodium dioxido(dioxo)molybdenum;sodium molybdate (anh.);Sodium molybdate (Na2MoO4);Sodium molybdate (VAN);Sodium Molybdate 35% Solution;Sodium Molybdate ACS;Sodium Molybdate Anhydrous;Sodium Molybdate Crystals, Technical Grade;Sodium molybdate dihydrate;Sodium Molybdate Dihydrate (Technical Grade);Sodium Molybdate Solution 35%;Sodium molybdate(VI);Sodium Molybdate, ACS Grade;Sodium Molybdate, anhydrous;sodium orthomolybdate;sodiummolybdate;UNII:948QAQ08I1;UNII-948QAQ08I1;Molybdic Acid (H2moo4), Disodium Salt, Dihydrate;Disodium molybdate;Disodium tetraoxomolybdate;Molybdenum sodium oxide;Moybdic Acid (H2MoO4);Sodium tetraoxomolybdate (2-);MOLYBDATE (MoO42-), DISODIUM, DIHYDRATE, (T-4)-;SODIUM MOLYBRATE;Sodium molybdate dih;SODIUM MOLYBDATE pure;SODIUM MOLYBDATE 2H2O;SODIUM MOLYBDATE, ACS;SodiumMolybdate2H2OAcs;SodiuM Molybdate dihydra;SODIUM MOLYBDIC, DIHYDRATE;SODIUM MOLYBDATE-2-HYDRATE;SODIUM MOLYBDATE DIHYDRATE;sodium molybdate dihydrate; disodium molybdate dihydrate;Sodyum molibdat; sodyummolibdat;sodyumolibdat;Sodium molybdate;;Disodium molybdate;monosodium molybdate(VI);Na2MoO4;sodium molybdate;sodium molybdate(VI);sodium molybdate(VI), 99Mo-labeled cpd;sodium molybdate(VI), dihydrate;sodium molybdenum oxide;Molybdate disodium;Molybdic acid, disodium salt;Molybdate (MoO42-), disodium, (beta-4)-;Sodium Molybdate, anhydrous.;Molybdate (MoO42-), sodium (1:2), (T-4)-;MFCD00003486;Sodium dimolybdate;Na2MoO4;sodium orthomolybdate;Sodium Molybdate ACS;MoNa2O4;disodium tetraoxomolybdate;sodium molybdate (anh.);AC1Q1UPT;Sodium Molybdate Anhydrous;Molybdate (MoO42-), disodium, (T -4)-;Molybdic acid, sodium salt;AC1L1V7F;AC1N9EV1;Sodium molybdate;sodium molybdate (anhydrous);Ddisodium Molybdate Dihydrate;Sodium Molybdate, ACS Grade sodium dioxido(dioxo)molybdenum; Sodium molybdate, anhydrous, powder, -100 mesh particle size, 99.9 trace metals basis;Molybdic acid (H2MoO4), disodium salt (8CI);Molybdic acid (H2MoO4), disodium sal(8CI),sodyummolibdate; 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REAGENT,SODIUM MOLYBDATE DIHYDRATE, 99+%,SODIUM MOLYBDATE-2-HYDRATE TECHNICAL,SODIUM MOLYBDATE-2-HYDRATE R. G., REAG. PH. EUR.,SODIUM MOLYBDATE DIHYDRATE ACS REAGENT,SODIUM MOLYBDATE DIHYDRATE, REAGENTPLUS, 99.99%,SODIUM MOLYBDATE DIHYDRATE, DAB,Sodium molybdate(VI) dihydrat MOLYBDENUM (IV) OXIDE Sodium molybdate SODIUM PHOSPHOMOLYBDATE Sodium silicate Sodium chloride Sodium hydroxide Sodium acetate Molybdenum Sodium gluconate Sodium carbonate Molybdic acid Sodium chlorite Sodium formate Sodium bicarbonate sodium Sodium chlorate CI NO 77605;molybdic;Natriummolybdat;Sodium molybdat;SODIUM MOLYBDATE;disodiummolybdate;SodiumMolybdateGr;Sodamidemolybdate;SODIUMMOLYBDENATE;Disodium molybdate;sodiummolybdate;SILICA MONITOR REAGENT;SODIUM META-MOLYBDATE;SODIUM MOLYBDATE;SODIUM MOLYBDENUM OXIDE;(beta-4)-molybdate(moo42-disodium;Disodium molybdate;disodium,(T-4)-Molybdate;disodiummolybdate;Molybdate (MoO42-), disodium, (T-4)-;Molybdate (MoO42-), disodium, (T-4)-;molybdic;Molybdic acid (H2MoO4), disodium salt;Molybdic acid, disodium salt;molybdicacid,disodiumsalt;Molybdicaciddisodiumsalt;Natriummolybdat;Sodium molybdate (Na2MoO4);sodiummolybdate(vi;sodiummolybdate(vi);SODIUM MOLYBDATE, 98+%;Sodium molybdate;Molybdate (MoO42-), disodium, (T-4)-;Disodium molybdate;Molybdate (MoO42-), disodium, (T-4)-;Molybdic acid (H2MoO4), disodium salt;Molybdic acid, disodium salt;Natriummolybdat;Sodium molybdate (Na2MoO4);Molybdic Acid Sodium Dihydrate; Disodium Molybdate Dihydrate.;Molybdic acid, sodium salt; Molybdate (MoO42-), sodium (1:2), (T-4)-;Molybdate disodium;Sodium molybdate;Sodium molybdate(VI); Disodium molybdate;Molybdic acid, disodium salt;Natriummolybdat;(Beta-4)-molybdate(moo42-disodium;disodium,(T-4)-Molybdate;disodiummolybdate;Disodium Molybdate Dihydrate.; Molybdic Acid Sodium Dihydrate;CCRIS 5442; Sodium molybdate(VI); Disodium molybdate; Molybdic acid, disodium salt; Natriummolybdat [German]; Sodium molybdate (Na2MoO4); Molybdate (MoO42-), disodium, (T-4)-; dioxo-disodiooxy-molybdenum;Disodium Molybdate;Molybdic Acid Disodium Salt;Natriummolybdat;Sodium Molybdenum;sodium molybdate;sodiummolybdtae;SODUM MOLYBDATE;SODUMMOLYBDATE;sodum molybdate;sodummolybdate;SODIUM MOLYBDATE;SODIUMMOLYBDATE;sodyum molibdat;sodyummolibdat;SODYUM MOLBDAT;SODYUMMOLBDAT;sodyum molbdat;sodyummolbdat;sodyum molibdat;sodyummolibdat;sodyum molibdat; sodyum molipdat; sodyum molipdad; sodyum molibdad; sodium molibdat; sodium molipdat; sodium molipdad; sodium molibdad; sodum molibdat; sodum molipdat; sodum molipdad; sodum molibdad; SODUM MOLBDAT; SODUMMOLBDAT; SODUM MOLBDAD; SODIUM MOLBDAT

Sodium molybdate

Sodium Molybdate is a crystalline powder essential for the metabolism and development of plants and animals as a cofactor for enzymes. (NCI)

NCI Thesaurus (NCIt)

Sodium molybdate (anhydrous) is an inorganic sodium salt having molybdate as the counterion. It has a role as a poison. It contains a molybdate.

ChEBI

Names

IUPAC name

Sodium molybdate

Other names

Disodium molybdate

Identifiers

Sodium molybdate CAS Number

7631-95-0 ☑

10102-40-6 (dihydrate) ☒

3D model (JSmol)

Interactive image

ChEBI

CHEBI:75215 ☒

ChemSpider

55350 ☒

ECHA InfoCard 100.028.683

EC Number

231-551-7

PubChem CID

61424

RTECS number

QA5075000

CompTox Dashboard (EPA)

DTXSID2052788 Edit this at Wikidata

InChI[show]

SMILES[show]

Sodium molybdate Properties

Sodium molybdate Chemical formula

Na2MoO4

Sodium molybdate Molar mass 205.92 g/mol (anhydrous)

241.95 g/mol (dihydrate)

Sodium molybdate Appearance White powder

Sodium molybdate Density 3.78 g/cm3, solid

Sodium molybdate Melting point 687 °C (1,269 °F; 960 K)

Sodium molybdate Solubility in water

84 g/100 ml (100 °C)

Sodium molybdate Refractive index (nD)

1.714

Sodium molybdate Hazards

Safety data sheet External MSDS

NFPA 704 (fire diamond)

NFPA 704 four-colored diamond

020

Flash point Non-flammable

Lethal dose or concentration (LD, LC):

LD50 (median dose)

4000 mg/kg (rat, oral)[1]

LC50 (median concentration)

>2080 mg/m3 (rat, 4 hr)[1]

Related compounds

Other anions

Sodium chromate

Sodium tungstate

Other cations

Ammonium molybdate

Sodium molybdate, Na2MoO4, is useful as a source of molybdenum.[2] It is often found as the dihydrate, Na2MoO4·2H2O.

The molybdate(VI) anion is tetrahedral. Two sodium cations coordinate with every one anion.[3]

Contents

1 History

2 Uses

3 Reactions

4 Safety

5 References

6 External links

History

Sodium molybdate was first synthesized by the method of hydration.[4] A more convenient synthesis is done by dissolving MoO3 in sodium hydroxide at 50-70 °C and crystallizing the filtered product.[3] The anhydrous salt is prepared by heating to 100 °C.

MoO3 + 2NaOH + H2O → Na2MoO4·2H2O

Uses

The agriculture industry uses 1 million pounds per year as a fertilizer. In particular, its use has been suggested for treatment of whiptail in broccoli and cauliflower in molybdenum-deficient soils.[5][6] However, care must be taken because at a level of 0.3 ppm sodium molybdate can cause copper deficiencies in animals, particularly cattle.[3]

Sodium molybdate is used in industry for corrosion inhibition, as Sodium molybdate is a non-oxidizing anodic inhibitor.[3] The addition of sodium molybdate significantly reduces the nitrite requirement of fluids inhibited with nitrite-amine, and improves the corrosion protection of carboxylate salt fluids.[7]

In industrial water treatment applications where galvanic corrosion is a potential due to bimetallic construction, the application of sodium molybdate is preferred over sodium nitrite. Sodium molybdate has the advantage in that the dosing of lower ppm’s of molybdate allow for lower conductivity of the circulating water. Sodium molybdate at levels of 50-100 ppm offer the same levels of corrosion inhibition that sodium nitrite at levels of 800+ ppm. By utilizing lower concentrations of sodium molybdate, conductivity is kept at a minimum and thus galvanic corrosion potentials are decreased.[8]

Reactions

When reacted with sodium borohydride, molybdenum is reduced to a lower valent oxide:[9]

Na2MoO4 + NaBH4 + 2H2O → NaBO2 + MoO2 + 2NaOH + 3H2

Sodium molybdate reacts with the acids of dithiophosphates:[3]

Na2MoO4 +

(R = Me, Et)

(RO)2PS2H

→ [MoO2(S2P(OR)2)2]

which further reacts to form [MoO3(S2P(OR)2)4].

Safety

Sodium molybdate is incompatible with alkali metals, most common metals and oxidizing agents. It will explode on contact with molten magnesium. It will violently react with interhalogens (e.g., bromine pentafluoride; chlorine trifluoride). Its reaction with hot sodium, potassium or lithium is incandescent.[10]

331058 Sodium molybdate dihydrate, ACS reagent, ≥99%,

M1003 Sodium molybdate dihydrate, ≥99.5%,

M1651 Sodium molybdate dihydrate, ≥99.5%, suitable for plant cell culture,

480967 Sodium molybdate dihydrate, 99.99% trace metals basis,

1.06521 Sodium molybdate dihydrate, for analysis EMSURE®,

1.06524 Sodium molybdate dihydrate, EMPLURA®,

8.43899 Sodium molybdate dihydrate, for synthesis,

1614421 Sodium molybdate dihydrate, United States Pharmacopeia (USP) Reference Standard,

About Sodium Molybdate

Molybdate IonSodium Molybdate is generally immediately available in most volumes. Hydrate or anhydrous forms may be purchased. High purity, submicron and nanopowder 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.

Sodium Molybdate Properties (Theoretical)

Compound Formula MoNa2O4

Molecular Weight 205.92

Appearance White powder

Melting Point N/A

Boiling Point N/A

Density 3.78 g/cm3

Solubility in H2O N/A

Exact Mass 207.864606

Monoisotopic Mass 207.864606

Customers For Sodium Molybdate Have Also Viewed

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Sodium Phosphomolybdate Hydrate

Sodium Molybdenum Oxide, Anhydrous

Sodium Molybdate Dihydrate

Ammonium Octamolybdate

Cobalt(II) Molybdenum Oxide Hydrate

Cyclopentadienylmolybdenum Tricarbonyl Sodium

Potassium Trimolybdate Nanowires

Linear Formula of Sodium Molybdate: Na2MoO4

IUPAC Name of Sodium Molybdate

disodium;dioxido(dioxo)molybdenum

Experimental Properties of Sodium Molybdate

Physical Description v

DryPowder

Liquid

OtherSolid

Melting Point of Sodium Molybdate

687°C

Density of Sodium Molybdate

3.78 g/cm³

Properties and Uses of Sodium Molybdate

Soluble in water. Dehydration may occur when the temperature is above 100 oC for a long time. In the production of dyes, pigments (precipitants of series pigments) are used as catalysts, as buffering agents and also as analytical reagents for alkaloids. It has a very common use in agriculture and metal finishing. For open and closed recirculation waters, it is used as a water-soluble corrosion inhibitor for machine coolants and metalworking fluids. It is tungsten intermediate. Used as a mordant. Water treatment agent is also used as weight additive and fire fighting material

Sodium Molybdate helps convert nitrate to amino acids and proteins.

Soluble powder for correcting molybdenum deficiency in plants. Can be soil or foliar applied.

Molecular weight of Sodium Molybdate

241.95

Sodium Molybdate is a source of molybdenum.

Molybdenum’s fundamental role in the human body is as a constituent of molybdoenzymes; some important molybdoenzymes are xanthine oxidase, sulphite oxidase and aldehyde oxidase. These are involved in the metabolism of sulphur amino acids and purine. By converting sulphite to sulphate, sulphite oxidase aids the metabolising of the sulphur amino acids methionine and cysteine, a process that is crucial to human health. This also helps the body reduce the harmful effects of sulphites generally.

PROPERTIES of Sodium Molybdate

Sodium molybdate is an odorless, white, hygroscopic solid (small scales or flakes). It is slightly soluble in water, insoluble in ethanol, acetone. Stable under ordinary conditions. Incompatible with alkali metals, most common metals and strong oxidizing agents.

Other uses of Sodium Molybdate

– manufacture of molybdated lubricants, pharmaceuticals, alkoloids, dyes, pigments,

– buffing compound for galvanizing,

– retardants and metal depressants,

– descaling agents, bleaching agents,

– water treatment.

Request

Sodum molybdate is a chemical used as an additive material in the treatment of irrigation water, which is used in trace amount of plants.Sodium Molybdate is a crystalline powder essential for the metabolism and development of plants and animals as a cofactor for enzymes. (NCI). Sodium molybdate is an inorganic sodium salt having molybdate as the counterion.Sodium molybdate, Na2MoO4, is useful as a source of molybdenum. It is often found as the dihydrate, Na2MoO4·2H2O. The molybdate(VI) anion is tetrahedral. Two sodium cations coordinate with every one anion.When reacted with sodium borohydride, molybdenum is reduced to a lower valent oxide.Sodium molybdate reacts with the acids of dithiophosphates.Sodium molybdate was first synthesized by the method of hydration.A more convenient synthesis is done by dissolving MoO3 in sodium hydroxide at 50-70 °C and crystallizing the filtered product. The anhydrous salt is prepared by heating to 100 °C.In industrial water treatment applications where galvanic corrosion is a potential due to bimetallic construction, the application of sodium molybdate is preferred over sodium nitrite. Sodium molybdate has the advantage in that the dosing of lower ppm`s of molybdate allow for lower conductivity of the circulating water. Sodium molybdate at levels of 50-100 ppm offer the same levels of corrosion inhibition that sodium nitrite at levels of 800+ ppm. By utilizing lower concentrations of sodium molybdate, conductivity is kept at a minimum and thus galvanic corrosion potentials are decreased.

Linear Formula of Sodium Molybdate: Na2MoO4

IUPAC Name of Sodium Molybdate

disodium;dioxido(dioxo)molybdenum

Experimental Properties of Sodium Molybdate

Physical Description v

DryPowder

Liquid

OtherSolid

Melting Point of Sodium Molybdate

687°C

Density of Sodium Molybdate

3.78 g/cm³

Properties and Uses of Sodium Molybdate

Sodium Molybdate helps convert nitrate to amino acids and proteins.

Soluble powder for correcting molybdenum deficiency in plants. Can be soil or foliar applied.

Molecular weight of Sodium Molybdate

241.95

Sodium Molybdate is a source of molybdenum.

PROPERTIES of Sodium Molybdate

Other uses of Sodium Molybdate

– manufacture of molybdated lubricants, pharmaceuticals, alkoloids, dyes, pigments,

– buffing compound for galvanizing,

– retardants and metal depressants,

– descaling agents, bleaching agents,

– water treatment.

Request

Applications of Sodium Molybdate

Environment, Agriculture:

The agriculture industry uses sodium molybdate as a fertilizer. It is a readily soluble source of molybdenum essential for optimum legume growth. Being the source of molybdenum, sodium molybdate is useful for curing a broccoli and cauliflower disease known as whiptail.

Biochemistry(chemicals tracer):

Sodium molybdate is used in biochemistry and medicinal chemistry to track various organic chemicals that are colorless after a chromatographical analysis, which it always stains blue. The blue color is also called molybdenum blue.

Industry (corrosion inhibitor):

It is used in as a non-oxidizing anodic inhibitor.The addition of sodium molybdate significantly reduces the nitrite requirement of fluids inhibited with nitrite-amine, and improves the corrosion protection of carboxylate salt fluids.

SODIUM MOLYBDATE INDUSTRY USES

It is used in the industry for corrosion inhibition, as it is a non-oxidizing anodic inhibitor. The addition of sodium molybdate significantly reduces the nitrite requirement of fluids inhibited with nitrite-amine, and improves the corrosion protection of carboxylate salt fluids.In industrial water treatment applications where galvanic corrosion is a potential due to bimetallic construction, the application of sodium molybdate is preferred over sodium nitrite. Sodium molybdate has the advantage in that the dosing of lower ppm on molybdate allow for lower conductivity of the circulating water.

Sodium molybdate is used as source of molybdate and it is often used in the form of Sodium molybdate dihydrate. It inactivated both the active and inactive form of the gluco corticoid receptor complex in murine models. It has been shown to reduce the emission of hydrogen sulfide from swine manure with the use of nitrites.

Applications of Sodium Molybdate

Environment, Agriculture:

Biochemistry(chemicals tracer):

Industry (corrosion inhibitor):

SODIUM MOLYBDATE INDUSTRY USES

Sodyum molibdat

Görünümü : Beyaz toz

Kimyasal Ad : Molybdic acid, disodium salt, dihydrate, Sodyum molibdat

Kimyasal Formülü : Na2MoO4.2H2O

Ambalaj ekli : 25 Kg. çuvallarda

Kullanm Alanlar :

Molibden geçi metallerinden olup saf halde gümüümsü beyaz renkli ve çok serttir. Ergime scakl oldukça yüksektir. Az miktardaMolybdate de sodiumavesiyle çeliin daha da sertletirilmesi salanabilir. Molibden bitkilerin beslenmesinde de önemli olup baz enzimlerde yer alr.

sveçli kimyac Carl Wilhelm Scheele 1778’de, o döneme dein bir kurun cevheri ya da grafit olduu sanlan mineralin (molibdenit) bilinmeyen bir metalin sülfür bileii olduunu gösterdi. sveçli kimyac Peter Jacob Hjelm de 1782’de molibdeni metal halinde ayrd ve Yunanca “kuruna benzer” anlamna gelen molybdos sözcüünden esinlenerek adlandrd.

Sodyum molibdat wulfenit (PbMoO4) veya powellit (CaMoO4) gibi minerallerde bulunursa da, asl ticari molibden kayna molibdenittir (MoS2). Molibden dorudan madencilik yoluyla ve bakr madencilii srasnda yan ürün olarak ta elde edilebilir. Molibden, cevherlerinde %0.01 den %0.5 e deien miktarlarda bulunur. Dünya molibden madenciliinin yaklak yars ABD’de (Phelps Dodge Corporation) yaplmaktadr.

Sodyum molibdat Kimyasal özellikleri bakmndan krom ve wolfram ile benzerlik gösteren molibden; yüksek ergime ve kaynama noktas, yüksek s dayanm, yüksek s iletkenlii ve düük termal genleme gibi üstün özelliklere sahiptir. Molibden 2623 °C de ergir. Bu özellii ile metaller arasnda altnc sray alr. 4639 °C de kaynayan molibden, soukta havadan etkilenmez, akkor halindeyken oksitlenir, nitrik ve sülfürik asitlerden etkilenir, yüksek scaklkta su buharn ayrtrr. Molibden’in younluu 10,28 gr/cm3 tür.

Sodyum molibdat Kullanm Alanlar

Tarm endüstrisi ylda 1 milyon sterlinlik bir gübre kullanyor. Özellikle, molibden eksiklii olan topraklarda brokoli ve karnabahar tohumlarnn ilenmesi için kullanlmas önerilmitir.

Bununla birlikte, 0.3 ppm’lik bir seviyedeki sodyum molibdatn hayvanlarda, özellikle srlarda bakr eksikliklerine neden olabilecei için dikkat edilmelidir.

Korozyon önleme için endüstride kullanlr, çünkü oksitleyici olmayan anodik bir inhibitördür.

Sodyum molibdat ilavesi, nitrit-amin ile inhibe edilen svlarn nitrit ihtiyacn önemli ölçüde azaltr ve karboksilat tuzu akkanlarnn korozyon korumasn gelitirir.

Galvanik korozyonun bimetal yapdan dolay potansiyel olduu endüstriyel su artma uygulamalarnda, sodyum nitritten çok sodyum molibdat uygulamas tercih edilir.

Sodyum molibdat, daha düük ppm’lik molibdat dozajlamann dolamdaki suyun daha düük iletkenliine sahip olmas avantajna sahiptir. 50-100 ppm düzeyindeki sodyum molibdat, 800 + ppm seviyelerinde sodyum nitrit olan korozyon inhibisyonu ile ayn seviyeleri sunar.

Daha düük konsantrasyonlarda sodyum molibdat kullanarak iletkenlik minimumda tutulur ve böylece galvanik korozyon potansiyelleri azaltlr

Sodyum Molibdat

ÜrünlerGenel KimyasallarAlkaliSodyum Molibdat

Kimyasal Ad: Sodyum Molibdat

Sodyum molibdat Formül: Na2MoO4

Sodyum molibdat Younluk: 3.78 g/cm3, kat

Sodyum molibdat Kaynama Noktas: –

Sodyum molibdat Erime Noktas: 687 °C

Sodyum molibdat Molar Kütle: 205.92 g/mol

Sodyum molibdat CAS No: 7631-95-0

Sodyum molibdat CAS numaras: 7631-95-0, 10102-40-6 (dihidrat)

Sodyum molibdat PubChem: 61424

Sodyum molibdat EC Numaras: 231-551-7

Sodyum molibdat RTECS numaras: QA5075000

Sodyum molibdat Moleküler formül: Na2MoO4

Sodyum molibdat Molar kütle: 205.92 g / mol (susuz) 241,95 g / mol (dihidrat)

Sodyum molibdat Görünüm: Beyaz toz

Sodyum molibdat Younluk: 3,78 g/cm3, kat

Sodyum molibdat Erime noktas: 687 ° C, 960 K, 1269 ° F

Sodyum molibdat Suda çözünürlük: 84 g/100 ml (100 ° C)

Sodyum molibdat Krlma indeksi (nD): 1.714

Açklama ve kullanm alanlar: Sodyum molibdat, Na2Mo04, bir molibden kayna olarak yararl bir kimyasaldr. Genellikle dihidrat Na2MoO4 · 2H2O olarak bulunur. Molibdat (VI) anyonu tetrahedraldir. Her bir anyon ile iki sodyum katyonu koordine edilir.

Tarm sektörü ylda 1 milyon tondan daha fazla kullanlan Sodyum Molibdat, özellikle, brokoli ve karnabahar üretiminde kullanlan bir kimyasal maddedir. Oksitleyici olmayan bir anodik inhibitör olduu için endüstride korozyon inhibisyonu için kullanlr. Sodyum molibdatn eklenmesi, nitrit-amin ile inhibe edilen svlarn nitrit gereksinimini önemli ölçüde azaltr ve karboksilat tuzu akkanlarnn korozyon korumasn gelitirir.

Genel Bilgi

Sodyum molibdat Kimyasal formülü Na2MoO4 olan Suda çözünebilen beyaz elmas kristali yapsnda bir kimyasal bileiktir. 100 oC’nin üzerinde uzun süre kaldnda dehidrasyon meydana gelebilir. Tarmda ve metal bitirme alannda oldukça yaygn kullanm alan bulur. Tungstenin ara maddesidir. Mordan olarak kullanlr.Molibden kayna olarak yararldr. Genellikle dihidrat formuyla Na2MoO4 · 2H2O olarak bulunmaktadr.Erimi magnezyum ile temasnda patlayc reaksiyonu gösterebilmektedir.

Sodyum molibdat Üretim ve Reaksiyonlar

Sodyum molibdat hidrasyon yöntemiyle 50-70 ° C scaklkta sodyum hidroksit içinde eritilmesi ve MoO3, filtre ürünü olarak kristalizasyonu ile elde edilebilir.

MoO3 + 2NaOH + H2O ? Na2MoO4 · 2H2O

Sodyum borohidrid ile reaksiyona olduunda, daha düük bir molibden oksit olarak indirgenebilir.

Na2MoO4+ NaBH4 + 2H2O ? NaBO2 + Moo2 + 2NaOH + 3 H2

Sodyum molibdat Kullanm Alanlar

Boya

Boyalarn üretiminde, pigmentlerde (seri pigmentlerin çöktürücüsü), katalizör olarak, tamponlama ajan olarak ayrca alkaloidin analitik ayrac olarak Sodyum molibdat kullanlmaktadr.

Tarm

Sodyum molibdat Tarm sektöründe yaygn olarak kullanlmaktadr.Özellikle, brokoli ve karnabahar, yetimesi için gerekli olan molibden eksiklini karlamakta yararlanlr.

Metal

Sodyum molibdat Metal sektöründe korozyon önleyici olarak kullanlmaktadr.

Dier

Sodyum molibdat Alev geciktiriciler ,su muamele ajan ve metal kirlilii içermeyen soutma sisteminin inhibitörü için kullanlmaktadr.

Sodyum molibdat Görünüm

Sodyum molibdat, beyaz kristal bir tozdur.

Çözünürlük

Sodyum Molibdat suda çözünür ancak asetonda çözünmez.

Kullanmlar

Sodyum molibdat, tarm sanayide Oligo maddesi olarak, metal yüzey ileme endüstrisinde hammadde olarak ve pigment üretiminde kullanlr.

Snflandrma

Güvenlik bilgi formunu (SDS) isteyin ve yerel yetkililere bavurun.

Emniyet

Request safety data sheet (SDS) and refer to points 4, 5, 6, 7, 8, 10, 13, 14, 15.

Belirtmeler

Sodyum Molibdat çeitli younluklarda normal olarak mevcuttur ve orijinal ambalajnda ve güvenlik bilgi formuna (SDS) belirtilen koullar altnda depolanmaktadr.

Eanlamllar

Disodyum molibdat dihidrat

Sodyum Molibdatn Lineer Formülü: Na2Mo04

IUPAC Sodyum Molibdatn Ad

disodyum; dioksido (diokso) molibden

Sodyum Molibdatn Deneysel Özellikleri

Fiziksel Tanmlar v

DryPowder

OtherSolid

Sodyum Molibdatn Erime Noktas

687 ° C

Sodyum Molibdat Younluu

3,78 g / cm³

Sodyum Molibdatn Özellikleri ve Kullanmlar

Suda çözünür. Dehidrasyon, scaklk 100 oC’nin üzerinde olduunda uzun süre ortaya çkabilir. Boyalarn üretiminde, pigmentler (seri pigmentlerin çökelti maddeleri) katalizörler, tamponlayc ajanlar ve ayrca alkaloidler için analitik reaktifler olarak kullanlrlar. Tarm ve metal kaplamada çok yaygn bir kullanma sahiptir. Açk ve kapal sirkülasyon sular için makine soutucular ve metal ileme svlar için suda çözünür korozyon önleyicisi olarak kullanlr. Tungsten ara maddesi. Bir mordant olarak kullanlr. Su artma maddesi arlk itici ve yangnla mücadele malzemesi olarak da kullanlr

Sodyum Molibdat, nitratn amino asitlere ve proteinlere dönütürülmesine yardmc olur.

Bitkilerdeki molibden eksikliini gidermek için çözünür toz. Toprak veya yapraktan uygulanabilir.

Sodyum Molibdatn moleküler arl

241,95

Sodyum molibdat molibden kaynadr.

Molibden’in insan vücudundaki temel rolü molybdoenzimlerin bir unsuru olarak görülür; Baz önemli molibdoenzimler ksantin oksidaz, sülfit oksidaz ve aldehit oksidazdr. Bunlar kükürt amino asitler ve purinin metabolizmasna karrlar. Sülfit sülfata dönütürülerek, sülfit oksidaz, insan sal için çok önemli olan metiyonin ve sistein kükürt amino asitlerinin metabolize edilmesine yardmc olur. Bu ayn zamanda vücudun sülfitlerin genel olarak zararl etkilerini azaltmasna yardmc olur.

Sodyum Molibdatn ÖZELLKLER

Sodyum molibdat kokusuz, beyaz, higroskopik bir katdr (küçük pullar veya pullar). Suda az çözünür, etanolde çözünmez, aseton. Normal koullar altnda kararldr. Alkali metalleri, en yaygn metalleri ve güçlü oksitleyici ajanlarla uyumaz.

Sodyum Molibdat’n dier kullanmlar

– Molibden yalayclar, ilaçlar, alkoloidler, boyalar, pigmentler,

– galvanizleme için parlatma bileimi,

– geciktiriciler ve metal depresanlar,

– kireç çözücü ajanlar, aartma maddeleri,

– su artma.

stek

Sodyum Molibdatn Lineer Formülü: Na2Mo04

IUPAC Sodyum Molibdatn Ad

disodyum; dioksido (diokso) molibden

Sodyum Molibdatn Deneysel Özellikleri

Fiziksel Tanmlar v

DryPowder

OtherSolid

Sodyum Molibdatn Erime Noktas

687 ° C

Sodyum Molibdat Younluu

3,78 g / cm³

Sodyum Molibdatn Özellikleri ve Kullanmlar

Sodyum Molibdat, nitratn amino asitlere ve proteinlere dönütürülmesine yardmc olur.

Bitkilerdeki molibden eksikliini gidermek için çözünür toz. Toprak veya yapraktan uygulanabilir.

Sodyum Molibdatn moleküler arl

241,95

Sodyum molibdat molibden kaynadr.

Sodyum Molibdatn ÖZELLKLER

Sodyum Molibdat’n dier kullanmlar

– Molibden yalayclar, ilaçlar, alkoloidler, boyalar, pigmentler,

– galvanizleme için parlatma bileimi,

– geciktiriciler ve metal depresanlar,

– kireç çözücü ajanlar, aartma maddeleri,

– su artma.

stek

Sodyum molibdat, az miktarda bitkilerde kullanlan sulama suyunun artmnda katk maddesi olarak kullanlan bir kimyasaldr. Sodyum Molibdat, enzimler için bir kofaktör olarak bitki ve hayvanlarn metabolizmas ve geliiminde esas olan kristalimsi bir tozdur. (NCI). Sodyum molibdat, kar iyon olarak molibdat içeren inorganik bir sodyum tuzudur. Sodyum molybdate, Na2MoO4, molibden kayna olarak kullanldr. Genellikle dihidrat Na2MoO4 · 2H2O olarak bulunur. Molibdat (VI) anyonu tetrahedraldir. ki sodyum katyonu her bir anyon ile koordine edilir. Sodyum borohidrür ile reaksiyona girdiinde, molibden daha düük deerlikli bir oksite indirgenir. Sodyum molibdat, ditiyofosfat asitleri ile reaksiyona girer. Sodyum molibdat önce hidratasyon yöntemi ile sentezlenir. Daha uygun bir sentez yaplr MoO3’ün 50-70 ° C’de sodyum hidrokside eritilmesi ve filtrelenen ürünün kristalletirilmesi ile hazrlanabilir. Susuz tuz, 100 ° C’ye stlarak hazrlanr. Galvanik korozyonun bimetal yapdan dolay potansiyel olduu endüstriyel su artma uygulamalarnda, sodyum nitritten daha fazla sodyum molibdat uygulamas uygundur. Sodyum molibdat, düük ppm’lik molibdat dozajnn dolamdaki suyun daha düük iletkenliine sahip olmas avantajna sahiptir. 50-100 ppm düzeyinde sodyum molibdat, 800 ± ppm seviyelerinde sodyum nitrit olan korozyon inhibisyonu ile ayn seviyeleri sunar. Daha düük konsantrasyonlarda sodyum molibdat kullanarak iletkenlik minimumda tutulur ve böylece galvanik korozyon potansiyelleri azaltlr.

Sodyum Molibdatn Uygulamalar

Çevre, Tarm:

Tarm endüstrisi, sodyum molibdat bir gübre olarak kullanyor. En iyi baklagil büyümesi için gerekli olan kolaylkla çözünür bir molibden kaynadr. Molibden’in kayna olan sodyum molibdat, brokoli ve karnabahar hastaln tedavi etmek için faydaldr.

Biyokimya (kimyasal madde izleyici):

Sodyum molibdat, biyokimya ve tbbi kimyada, her zaman mavi lekelenen bir kromatografik analizden sonra renksiz çeitli organik kimyasallar izlemek için kullanlr. Mavi renge molibden mavisi denir.

Endüstri (korozyon önleyici):

Oksidasyon önleyici bir anodik inhibitör olarak kullanlr. Sodyum molibdat ilavesi, nitrit-amin ile inhibe edilen akkanlarn nitrit ihtiyacn önemli ölçüde azaltr ve karboksilat tuzu akkanlarnn korozyon korumasn gelitirir.

SODYUM MOLBDAT SANAY KULLANIMI

Korozyon önleme endüstrisinde kullanlr, çünkü oksitleyici olmayan anodik bir inhibitördür. Sodyum molibdat ilavesi, nitrit-amin ile inhibe edilen akkanlarn nitrit ihtiyacn önemli ölçüde azaltr ve karboksilat tuzu akkanlarnn korozyon korumasn gelitirir. Galvanik korozyonun bimetal yapya bal olarak potansiyel olduu endüstriyel su artma uygulamalarnda, sodyum molibdatn uygulanmas, Sodyum nitrit üzerinde tercih edilir. Sodyum molibdat, molibdat üzerindeki düük ppm dozajnn dolamdaki suyun daha düük iletkenliine sahip olmas avantajna sahiptir.

Molibdenin kayna olarak sodyum molibdat kullanlr ve sklkla Sodyum molibdat dihidrat olarak kullanlr. Fare modellerinde gluko kortikoid reseptör kompleksinin hem aktif hem de inaktif halini inaktive etti. Domuz gübresinden hidrojen sülfür emisyonunu nitritler kullanarak azaltt gösterilmitir.

Sodyum Molibdatn Uygulamalar

Çevre, Tarm:

Biyokimya (kimyasal madde izleyici):

Sodyum molibdat, biyokimya ve tbbi kimyada, her zaman mavi lekelenen bir kromatografik analizden sonra renksiz çeitli organik kimyasallar izlemek için kullanlr. Mavi renge molibden mavisi denir.

Endüstri (korozyon önleyici):

SODYUM MOLBDAT SANAY KULLANIMI

Molybdate de sodium

Identification

No CAS 7631-95-0

10102-40-6 (dihydrate)

No ECHA 100.028.683

No CE 231-551-7

SMILES

[Afficher]

InChI

[Afficher]

Apparence du molybdate de sodium poudre blanche1.

Propriétés chimiques du molybdate de sodium

Formule brute Na2MoO4

Masse molaire2 205,94 ± 0,02 g/mol

Mo 46,6 %, Na 22,33 %, O 31,08 %,

Propriétés physiques

T° fusion 687 °C1

Solubilité dans l’eau à 100 °C : 840 g·l-11

Masse volumique 3,78 g·cm-31

Molybdate de sodium

Le molybdate de sodium est une source utile de molybdène.

MOLYBDATE(VI) DE SODIUM [archive], fiche(s) de sécurité du Programme International sur la Sécurité des Substances Chimiques [archive], consultée(s) le 9 mai 2009

Masse molaire calculée d’après « Atomic weights of the elements 2007 » [archive], sur www.chem.qmul.ac.uk.

« Molybdate de sodium [archive] » dans la base de données de produits chimiques Reptox de la CSST (organisme québécois responsable de la sécurité et de la santé au travail), consulté le 25 avril 2009

Description

Formule moléculaire brute : MoNa2O4

Principaux synonymes

Noms français :

DISODIUM MOLYBDATE

Molybdate de sodium

MOLYBDATE DE SOUDE

MOLYBDATE(VI) DE SODIUM

MOLYBDIC ACID (H2MoO4), DISODIUM SALT

MOLYBDIC ACID, DISODIUM SALT

Sodium molybdate

SODIUM MOLYBDATE(VI)

Noms anglais :

Sodium molybdate

Utilisation et sources d’émission

Fabrication de colorants, agent de dosage analytique

Physicochemical Information

Density 2.71 g/cm3 (22 °C) (for the dihydrate)

Melting Point 687 °C Elimination of water of crystallisation

pH value 9 – 10 (840 g/l, H₂O, 20 °C)

Bulk density 1000 – 1400 kg/m3

Solubility 840 g/l

Toxicological Information

LD 50 oral LD50 Rat 4233 mg/kg

LD 50 dermal LD50 Rat > 2000 mg/kg

Safety Information according to GHS

Libellé préféré : molybdate de sodium;

Synonyme CISMeF : molibdate de sodium dihydraté; molibdate de sodium;

Libellé CAS CISMeF : molybdate de disodium;

Libelles Related CAS CISMeF : oxyde de molybdène et de sodium;

Hyponyme CISMeF : molybdate de sodium dihydraté;

Codes EINECS : 231-551-7;

substance (CISMeF) : O;

medicament (CISMeF) : O;

Composé chimique inorganique hydraté de formule Na2MoO4·2H2O qui est une des sources principales de complémentation en molybdène.

Molybdate de sodium

Caractéristiques du molybdate de sodium

Point de fusion:687 °C(lit.)

Densité:3.78 g/mL at 25 °C(lit.)

Index de réfraction:1.714

Sensibilité: Hygroscopique

Merck :14,8645

Stabilité: Stable. Incompatible avec les agents oxydants forts.

Les applications du molybdate de sodium et de la synthèse

Propriétés chimiques: Cristal de diamant blanc. Légèrement soluble dans l’eau, insoluble dans l’acétone.

Application:

Molybdate de sodium

Utilisé comme inhibiteur de corrosion métallique, détartrants, agents de blanchiment et peau et cheveux pour favoriser l’agent de protection

Utilisé comme réactif analytique pour la détermination des alcaloïdes, des colorants et de l’industrie pharmaceutique

Pour la fabrication d’alcaloïdes, l’encre, les engrais, le pigment rouge de molybdène, et l’agent de précipitation de la lumière de pigment de précipitation, le catalyseur, le sel de molybdène peut également être utilisé pour faire des retardateurs de flamme et de métaux sans pollution système refroidisseur inhibiteur, également utilisé comme zinc, Réactifs chimiques.

Pour la préparation de sels et colorants de molybdène, de pigments, de catalyseurs, d’inhibiteurs de corrosion, etc.

En général le produit est disponible. Molybdène De Sodium est stocké dans l’emballage d’origine et dans les conditions mentionnées sur la fiche de données de sécurité.

Formuletr

Na2MoO4.2H20

Le molybdate de sodium, utilisé plus d’un million de tonnes par an dans le secteur agricole, est une substance chimique utilisée notamment dans la production de brocoli et de chou-fleur.Molybdate de sodium est utilisé dans l’industrie pour l’inhibition de la corrosion carMolybdate de sodium s’agit d’un inhibiteur anodique non oxydant. L’ajout de molybdate de sodium réduit considérablement les besoins en nitrite des fluides inhibés par les nitrites-amines et améliore la protection contre la corrosion des fluides de sel de carboxylate.

Informations générales

Le molybdate de sodium s’agit d’un composé chimique cristallin diamant blanc soluble dans l’eau de formule chimique Na2MoO4. Une déshydratation peut survenir si elle reste plus de 100 oC.Molybdate de sodium trouve une utilisation répandue dans l’agriculture et la finition des métaux. C’est l’intermédiaire du tungstène.Molybdate de sodium est utilisé comme mordant et est utile comme source de molybdène.Molybdate de sodium se trouve généralement sous forme de dihydrate sous forme de Na2MoO4 · 2H2O. Peut présenter une réaction explosive au contact du magnésium fondu.

Production et réactions

Le molybdate de sodium peut être obtenu par dissolution dans de l’hydroxyde de sodium à 50-70 ° C avec une méthode d’hydratation au molybdate de sodium et une cristallisation de MoO3 comme produit filtrant.

MoO3 + 2NaOH + H2O? Na2MoO4 · 2H2O

Lorsqu’il réagit avec le borohydrure de sodium,Molybdate de sodium peut être réduit sous forme d’oxyde de molybdène inférieur.

Na2MoO4 + NaBH4 + 2H2O? NaBO2 + Moo2 + 2NaOH + 3 H2

Domaines d’utilisation

peinture

Le molybdate de sodium est utilisé dans la production de colorants, de pigments (précipitateur de pigments en série), comme catalyseur, comme agent tampon, ainsi que comme réactif analytique d’alcaloïde.

agriculture

Le molybdate de sodium est largement utilisé dans le secteur agricole, notamment le brocoli et le chou-fleur pour combler la carence en molybdène nécessaire à la culture.

métal

Le molybdate de sodiumest utilisé comme inhibiteur de corrosion dans l’industrie métallurgique.

autre

Le molybdate de sodium est utilisé pour les retardateurs de flamme, l’agent de traitement de l’eau et l’inhibiteur du système de refroidissement sans pollution métallique.

vue

Le molybdate de sodium est une poudre cristalline blanche.

résolution

Le molybdate de sodium est soluble dans l’eau mais insoluble dans l’acétone.

utilisations

Le molybdate de sodium est utilisé comme matériau Oligo dans l’industrie agricole, comme matière première dans l’industrie du traitement de surface des métaux et dans la production de pigments.

classification

Demandez la fiche de données de sécurité (FDS) et contactez les autorités locales.

sécurité

Demander la fiche de données de sécurité (FDS) et se référer aux points 4, 5, 6, 7, 8, 10, 13, 14, 15.

caractéristiques

Le molybdate de sodium est normalement disponible en différentes densités et est stocké dans son emballage d’origine et dans les conditions spécifiées dans la fiche de données de sécurité (FDS).

SODIUM MOLYBDATE

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