... selenium 74 3,CAS: 7782-49-2 Selenium ingot, Se, 99.99% 1, Physical character:Atomic Weight: 78. ... bp: 684.9 °C2, Specification:High Purity Selenium:Se-05 Grade 99.999. The content of Selenium is ... & Tl is bellow 10 ppm;Uitra Purity Selenium:Se-06 Grade 99.9999. The content of Selenium is ... :Virgulate, Powder.4, Usage:It is mainly used in the preparation of the material of the selenium drum, ...