Product Specification/Models
Ammonium Paratungstate(APT)
Purity 99.90%, 99.95%, 99.98%
WO3 88.5%min 
Impurities PCT Max Each
Grade APT-0 
Purity 99.98%
As/Ca/Co/Cr/Fe/K/Mn/Na/Si/Ti/V 0.001, Mo 0.002, Sb 0.0008
Bi/Pb/Sn 0.0001, Mg/P/S 0.0007, Al/Ni 0.0005, Cu 0.0003
Grade APT-1 
Purity 99.95%
Al/As/Ca/Co/Cr/P/Sb/Fe/Mg/Na/Ni/S/Ti/V 0.001, S 0.0007
Mo 0.005, K 0.0015, Bi/Pb 0.0001 Sn 0.0003, Cu 0.0005 
Grade APT-2 
Purity 99.90%
Al/Co/Cr/Cu/Mn/Ni/S/Ti/V 0.001, Si 0.003, Sn 0.0005
As/Ca/Fe/K/Mg/Na/P/Sb 0.002, Bi/Pb 0.0002, Mo 0.01
Ignition Loss 11.5%max
Particle Size 250um(-60mesh)