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431346

Sigma-Aldrich

Ammonium molybdate tetrahydrate

ACS reagent, 99.98% trace metals basis

Synonym(s):
Molybdic acid ammonium salt tetrahydrate, Ammonium heptamolybdate tetrahydrate
Linear Formula:
(NH4)6Mo7O24 · 4H2O
CAS Number:
Molecular Weight:
1235.86
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.55

Quality Level

grade

ACS reagent
for inorganic trace analysis

assay

81.0-83.0% MoO3 basis
99.98% trace metals basis

form

powder

reaction suitability

reagent type: catalyst
core: molybdenum

impurities

≤0.005% insolubles

density

2.498 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.002%
nitrate (NO3-): passes test
phosphate (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.02%

cation traces

Mg and allied cations: ≤0.01%
heavy metals: ≤0.001% (by ICP-OES)

SMILES string

N.N.N.N.N.N.O.O.O.O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O[Mo](O)(=O)=O.O[Mo](O)(=O)=O.O[Mo](O)(=O)=O

InChI

1S/7Mo.6H3N.10H2O.18O/h;;;;;;;6*1H3;10*1H2;;;;;;;;;;;;;;;;;;/q;;;;3*+2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/p-6

InChI key

FIXLYHHVMHXSCP-UHFFFAOYSA-H

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General description

Ammonium molybdate tetrahydrate (AMT) is a molybdenum salt. Study of its extraction from nickel-molybdenum (Ni–Mo) ore by direct hydrometallurgical method has been reported. Its degradation by combustion to form elemental molybdenum powder using metallic reducers has been investigated.

Application

Applied in the ultrasonic synthesis of phase-pure praseodymium molybdate, Pr2Mo3O12.
Reagent used for oxidation of sulfides to sulfonyls.
Ammonium molybdate tetrahydrate may be used in the following processes:
  • As a precursor in the generation of calcium molybdate (CaMoO4) spherulites.
  • Synthesis of porous carbon-supported molybdenum dioxide (MoO2).
  • Preparation of Iodine-iodide-molybdate solution to determine glucose level by glucose oxidase method.
  • Preparation of polymer bulk heterojunction solar cells.
  • As a precursor in the synthesis of Mo-N-codoped TiO2 (titanium dioxide).
  • Synthesis of MoBi2S5 (molybdenum bismuth sulphide) thin films.

Packaging

50, 250 g in poly bottle

Features and Benefits

Meets A.C.S. reagent specificatons.

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Origin

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