... ingot ,Selenium grain,Selenium powder 1, 99.5% min purity 2,shape :ingot/powder/ selenium isotope / selenium 74 ... Selenium ingot ,Selenium grain,Selenium powder 1, Physical character:Atomic Weight: 78.96Electronegative: ... Ni, Pb, Sb, Te, Zn, Mn,Ca & Tl is bellow 10 ppm;Uitra Purity Selenium:Se-06 Grade ... is bellow 1 ppm.3, Physical Size:Virgulate, Powder.4, Usage:It is mainly used in the ...