WO3 content (%, min):99.9
Impurity content (%, max):Si 0.001, Al 0.001, Fe 0.001, Cu
0.0005, Mg 0.0007, Ni 0.0005, Mn 0.0005, P 0.0007, K 0.001,
Na 0.001, Ca 0.001, Pb 0.0001, Sn 0.0001, Bi 0.0001, Sb
0.0005, As 0.001, S 0.0007, Cr 0.001, Co 0.001, Mo 0.003,
Ti 0.001, V 0.001
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