Ammonium Para Tungstate (APT)

Ammonium Para tungstate is the most important precursor for the majority of tungsten products. All other intermediates such as tungsten trioxide. Tungsten Blue oxide, tungsten acid & ammonium metaltungstste can be derived From A.P. T.

Ammonium Para tungstate 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 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.

Molecular Weight 3060.46

CAS Registry Number 11120-25-5

Chemical Formula: [NH4 (H2 W12 O42)]. 4H2 O