supply Ammonium paratungstate CAS 11120-25-5 

The downstream products of metallic tungsten powder include tungsten material series, such as tungsten bar, tungsten wire and other electric vacuum materials SPECIFICATIONS: Impurity Content Grade APT-0 WO3 Min (%) 88.5 Chemical Composition impurity Content Max (%) AI 0.0005 As 0.001 Bi 0.0001 Ca 0.001 Co 0.001 Cr 0.001 Cu 0.0003 Fe 0.001 K 0.001…