Chemical formula: 5(NH4)2•O12WO3•5H2O, white crystalline power, soluble in water, stable in air under normal temperature.
Decompound to be tungsten trioxide under 250°C above, mainly used in manufacturing the tungsten powder, tungsten bar, tungsten wire, hard alloy and other chemical products.
Quality Standard
1.WO3 %min 88.0-89.0
2. Impurities %max
Packing: In carton drum or woven plastic bag of 25kgs net each.
High grade |
APT-1 |
APT-2 |
Al |
0.0005 |
0.001 |
As |
0.001 |
0.002 |
Bi |
0.0001 |
0.0005 |
Ca |
0.001 |
0.002 |
Cd |
0.0001 |
0.0005 |
Co |
0.001 |
0.002 |
Cr |
0.001 |
0.002 |
Cu |
0.0005 |
0.0007 |
Fe |
0.001 |
0.002 |
K |
0.0015 |
0.002 |
Mg |
0.0005 |
0.001 |
Mn |
0.0005 |
0.001 |
Mo |
0.002 |
0.005 |
Na |
0.002 |
0.005 |
Ni |
0.0005 |
0.001 |
P |
0.0007 |
0.002 |
Pb |
0.0001 |
0.0002 |
S |
0.001 |
0.002 |
Sb |
0.002 |
0.0005 |
Si |
0.001 |
0.003 |
Sn |
0.0001 |
0.0005 |
Ti |
0.001 |
0.0015 |
V |
0.001 |
0.0015 |
|
