Type WO3-0 WO3-1 WO3-2 Purity, no less than (%) 99.98 99.95 99.90 Impurity, no more than (%) (according to WO3) Al 0.0005 0.0005 0.0010 As 0.0010 0.0010 0.0020 Bi 0.0001 0.0001 0.0001 Ca 0.0010 0.0010 0.0020 Co 0.0010 0.0010 0.0020 Cr 0.0010 0.0010 0.0010 Cu 0.0005 0.0005 0.0010 Fe 0.0010 0.0010 0.0020 K 0.0010 0.0015 0.0020 Mn 0.0005 0.0005 0.0010 Mg 0.0005 0.0010 0.0020 Mo 0.0020 0.0050 0.0100 Na 0.0010 0.0015 0.0020 Ni 0.0005 0.0005 0.0010 P 0.0005 0.0010 0.0050 Pb 0.0001 0.0001 0.0001 S 0.0005 0.0007 0.0010 Sb 0.0010 0.0010 0.0015 Si 0.0010 0.0010 0.0020 Sn 0.0001 0.0003 0.0005 Ti 0.0010 0.0010 0.0010 V 0.0010 0.0010 0.0010 Physical Properties: Mesh Size(mesh): 80 Apparent Density(g/cm3): 2.2~2.8 Particle Size(Fass)(um): 12~18 Mesh Analysis (%): +70mesha≤1.0 +100mesha≤1.5 -325mesha≤40