| Identification | More | [Name]
Ammonium dimolybdate | [CAS]
27546-07-2 | [Synonyms]
AMMONIUM DIMOLYBDATE
AMMONIUM MOLYBDATE
AMMONIUM MOLYBDATE (DI)
AMMONIUM MOLYBDATE REAGENT
AMMONIUM MOLYBDATE TS
AMMONIUM MOLYBDENUM OXIDE (DI)
MOLYBDIC ACID
molybdate(mo2o72-),diammonium
Ammoniumdimolybdate=Diammoniumdimolybdate
Molybdic(Ⅵ) acid
Molybdic(VI) acid
Ammoniummolybdate(di),Mo56.5%
Ammoniumdimolybdate,99%
Ammonium molybdenum oxide ((NH4)2Mo2O7)
Diammoniumdimolybdat
molybdate, diammonium
Diammonium dimolybdate
DIAMMONIUMHEPTAOXODIMOLYBDATE(2-) | [EINECS(EC#)]
231-970-5 | [Molecular Formula]
H4Mo2NO8-3 | [MDL Number]
MFCD00010882 | [Molecular Weight]
337.91 | [MOL File]
27546-07-2.mol |
| Hazard Information | Back Directory | [Chemical Properties]
white powder(s); obtained by crystallization from a solution of MoO3 containing excess NH3; used as a high purity source for the preparation of Mo metal [KIR8l] [ALF93] | [Flammability and Explosibility]
Notclassified |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S24/25:Avoid contact with skin and eyes . | [TSCA ]
Yes | [HS Code ]
28417010 |
| Questions And Answer | Back Directory | [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.
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