WO3含量(%, min)：99.9 

杂质含量 (%, 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