Hexaammonium molybdate

Physical Properties Uses Preparation Reactions

Product Name: Hexaammonium molybdate
CAS No.: 12027-67-7
Chemical Name: Hexaammonium molybdate
Synonyms: AMMONIUM HEPTAMOLYBDATE;Ammonium molybdate (para) hydrate;ammonium heptamolybdrate;hexaammonium heptamolybdate;PHOSPHATE MONITOR FIRST REAGENT;ammoniummolybdate((nh4)6(mo7o24));NPW-150 AMMONIUM MOLYBDATE MIXTURE;PHOSPHATE MONITOR REDUCTION REAGENT;PHOSPHATE MONITOR REDUCTION SOLUTION;ammonium molybdate (para) hydrate, puratronic
CBNumber: CB2309998
Molecular Formula: H4Mo7NO24(-5)
Formula Weight: 1073.67
MOL File: 12027-67-7.mol

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Hexaammonium molybdate Property

Melting point:: 190°C
Density: 2,498 g/cm³
storage temp.: Store at RT.
solubility: H₂O: soluble
form: Liquid
Specific Gravity: 2.498
color: Clear light colored
Water Solubility: Freely soluble in water.
Merck: 14,533
Exposure limits: ACGIH: TWA 0.5 mg/m3
NIOSH: IDLH 1000 mg/m3
Stability:: Stable.
CAS DataBase Reference: 12027-67-7(CAS DataBase Reference)
EPA Substance Registry System: Molybdate (Mo7O246-), ammonium (1:6) (12027-67-7)

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Safety

Hazard Codes: Xi
Risk Statements: 22-36/38-52/53-36/37/38
Safety Statements: 26-36
RIDADR: UN 3264
WGK Germany: -
RTECS: QA4900000
TSCA: Yes
HS Code: 28417010
Hazardous Substances Data: 12027-67-7(Hazardous Substances Data)
Toxicity: mic-esc 2 mmol/L MUREAV 31,185,1975

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 67210
Product name: Molybdenum Standard for AAS
Purity: TraceCERT®, 1 g/L Mo in hydrochloric acid (nominal concentration)
Packaging: 250 mL
Price: $104
Updated: 2025/07/31

Strem Chemicals

Product number: 02-0745
Product name: Ammonium molybdate tetrahydrate (99.98%-Mo)
Packaging: 500g
Price: $97
Updated: 2021/12/16

Strem Chemicals

Product number: 02-0745
Product name: Ammonium molybdate tetrahydrate (99.98%-Mo)
Packaging: 100g
Price: $29
Updated: 2021/12/16

Strem Chemicals

Product number: 93-0245
Product name: Ammonium molybdate tetrahydrate (ACS)
Packaging: 100g
Price: $29
Updated: 2021/12/16

Strem Chemicals

Product number: 93-0245
Product name: Ammonium molybdate tetrahydrate (ACS)
Packaging: 500g
Price: $97
Updated: 2021/12/16

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Hexaammonium molybdate Chemical Properties,Usage,Production

Physical Properties

Colorless, monoclinic crystal; density 2.276 g/cm3; decomposes on heating; soluble in water (decomposes); also soluble in acid; insoluble in alcohol and liquid ammonia.

Uses

Ammonium molybdates are used to prepare high purity grade molybdenum metal powder, sheet, or wire; for colorimetric analysis of phosphates and arsenates; for decorating ceramics; and as catalysts.

Preparation

Ammonium molybdate is prepared by treating molybdenum oxide with excess ammonia in an aqueous solution. The crystals are obtained after evaporation of water.
MoO3 + 2NH3 + H2O → (NH4)2MoO4

Reactions

Decomposes on heating or on treatment with alkalies; reacts with lead chloride and other metal salts to form their metal molybdates:
(NH4)2MoO4 + PbCl2 → PbMoO4 + 2NH4Cl
Reacts with phosphates or arsenates to form ammonium phosphomolybdate (NH4)3PO4•12MoO3, or ammonium arsenomolybdate, (NH4)3AsO4•12MoO3.

Chemical Properties

Ammonium heptamolybdate is an odourless crystalline compound ranging in colour from white to yellow-green. It is usually encoutered as the tetrahydrate, whose chemical formula is (NH4)6Mo7O24·4H2O. It is often referred to simply as ammonium molybdate, although this name can also refer to ammonium orthomolybdate, (NH4)2MoO4, and several other species.

General Description

White to greenish-yellow solid. Sinks and mixes with water.

Air & Water Reactions

Water soluble.

Reactivity Profile

Salts, basic, such as Hexaammonium molybdate , are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible.

Health Hazard

Inhalation causes irritation of nose and throat. Contact with eyes causes irritation.

Fire Hazard

Special Hazards of Combustion Products: Toxic oxides of nitrogen may form in fire.

Flammability and Explosibility

Not classified

Agricultural Uses

Ammonium molybdate, (NH₄)₆MO₇O₂₄·2H₂O is an important molybdenum fertilizer. It is an ammonium salt of molybdic acid and contains about 50% molybdenum.
Ammonium molybdate is generally mixed with NPK fertilizers, depending on the crop requirement (generally 50 to l000 gm per ha). The fertilizer is also applied as a foliar spray, but coating or soaking seeds with ammonium molybdate is the easiest method of application, which requires very little fertilizer.

Safety Profile

Mutation data reported. Whenheated to decomposition it emits toxic vapors of Mo andNH3.

Hexaammonium molybdate Preparation Products And Raw materials

Raw materials

Ammonium molybdate

Preparation Products

catalysts for acrolein oxidation to acrylic acid Molybdenum trioxide Molybdenum

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Hexaammonium molybdate Suppliers

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View Lastest Price from Hexaammonium molybdate manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD

Product: Hexaammonium molybdate 12027-67-7
Price: US $0.00/KG
Min. Order: 1KG
Purity: 98%min
Supply Ability: 30tons/month
Release date: 2023-02-03

Hebei Chuanghai Biotechnology Co., Ltd

Product: Hexaammonium molybdate 12027-67-7
Price: US $0.00-0.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 500000kg
Release date: 2024-10-30

Hebei Zhuanglai Chemical Trading Co.,Ltd

Product: Hexaammonium molybdate 12027-67-7
Price: US $10.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 20ton
Release date: 2024-05-29

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