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Ammonium molybdate tetrahydrate

ACS reagent, 99.98% trace metals basis

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

Quality Level


ACS reagent
for inorganic trace analysis


81.0-83.0% MoO3 basis
99.98% trace metals basis

reaction suitability

reagent type: catalyst
core: molybdenum


≤0.005% insolubles


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




InChI key


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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.


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.


50, 250 g in poly bottle

Features and Benefits

Meets A.C.S. reagent specificatons.

Storage Class Code

13 - Non Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

In-situ preparation of porous carbon-supported molybdenum dioxide and its performance in the oxidative desulfurization of thiophene.
Zhuang L, et al.
J. Mater. Sci., 49(16), 5606-5616 (2014)
Influence of vacuum annealing on the structural and photoelectrochemical properties of nanocrystalline MoBi2S5 thin films.
Pawar NB, et al.
Current Applied Physics, 14(3), 508-515 (2014)
Enhanced visible light activity and mechanism of TiO2 codoped with molybdenum and nitrogen.
Cheng X, et al.
Materials Science and Engineering, B, 178(7), 425-430 (2013)
Recovery and purification of molybdenum from Ni-Mo ore by direct air oxidation in alkaline solution.
Zhao Z, et al.
Hydrometallurgy, 103(1), 68-73 (2010)
Tetrahedron, 62, 11592-11592 (2006)

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