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Ammonium Metatungstate Hydrate

Ammonium Metatungstate Picture

Chinese Name  偏钨酸铵水合物  Ca  ≤10 mg/kg
English Name  Ammonium metatungstate hydrate  Cd  ≤5 mg/kg
Chemical Formula  (NH4)6H2W12O40 • xH2O  Co  ≤10 mg/kg
Molecular Weight  2974.3  Cu  ≤5 mg/kg
CAS Number  12333-11-8  Fe  ≤5 mg/kg
Melting Point  100 °C (dec.)(lit.)  K  ≤10 mg/kg
MDL Number   MFCD00150662  Na  ≤10 mg/kg
Grade  T  Ni  ≤5 mg/kg
WO3 Content  ≥99.0%  Pb  ≤5 mg/kg
Impurity  ≤0.005% insoluble in water  Zn ≤10 mg/kg
Solubility in Water  0.1 g / mL,clear and colorless  -  -

Ammonium metatungstate hydrate was used as a source of tungsten, during preparation of catalysts, in an experimental procedure conducted, for identifying by-products produced by catalytic dehydration of d-xylose, using two-dimensional gas chromatography-time-of-flight mass spectrometry. It was also used as a complexing agent, found to be advantageous in the depolymerisation of polytungstate anions, and to promote effective arrangement and coordination of nickel around tungsten species, in an experimental study investigating the structure-function relationship of Ni-W sulphide hydrogenation catalysts.

Ammonium Metatungstate Molecular Structure