... 99.999%. The total content of Ag, Al, Bi, Cd, Cu, Fe, Co, In, Mg, Ni, Pb, Sb, Te, Zn, Mn,Ca ... .9999%. The total content of Ag, Al, Mg, Au, Bi, Cd, Co, In, Cu, Fe, Te, Pb & Ni is bellow 1 ppm ... , Physical Size:Virgulate, Powder.4, Usage:It is mainly used in the preparation of the material of the selenium drum, photoelectric ...