Product name:Ammonium paratungstate
Synonym:Ammonium Paratungstate;Tungsten;Ammonium tungsten oxide hydrate
CAS:11120-25-5
Molecular Formula:H40N10O20W5
Formula Weight:1419.57
Density:19.3 g/mL at 25 °C(lit.)
Boiling point:5660 °C(lit.)
Melting point:3410 °C(lit.)
Water solubility:Soluble in water, insoluble in alcohol.
Appearance:White powder
Description:Used as raw material for the manufacture of other tungsten compounds and tungsten
Ammonium paratungstate is produced separating tungsten from its ore. Once the ammonium paratungstate is prepared, it is heated to its decomposition temperature, 600 °C. Left over is WO3, tungsten(VI) oxide. From there, the oxide is heated in an atmosphere of hydrogen, reducing the tungsten to elemental powder, leaving behind water vapor. From there, the tungsten powder can be fused into any number of things, from wire to bars to other shapes.