High Purity Bismuth Oxide(3N 4N 5N 6N) 3N 1.Bi2O3 99.9% 2.Impurity Max each Pb/Cu0.002%, K0.001%, Mg0.004%, Na0.006%, Ca/Fe0.005% 3.Size 2-4.5um 4N 1.Bi2O3 99.99% 2.Impurity Max each Cu/Pb/Fe10ppm, Mn/Ca/Cd/Zn/Sb/Mg/Ni/Co5ppm 3.Size -100mesh Packing25kgs in sealed plastic bag 5N 1.Bi2O3 99.999% 2.Impurity Max each Co/Mg/Ni/Pb/Cr/Mn/Fe0.5ppm, Ag/Cu/Ca1ppm 3.Size -100mesh 6N 1.Bi2O3 99.9999% 2.Impurity Max each Ag0.01ppm, Fe/Ni 0.1ppm, Cr/Ca 0.05ppm, Mn/Al 0.03ppm, Pb/Cu/Mg0.06ppm 3.Size -100mesh Packing 1kg in polyethylene bottle