Selenium shape :ingot/powder/ selenium isotope / selenium 74 CAS: 7782-49-2 Product SpecificantionPurity: 99.5% MINPacking 25kg/iron drum Purity:99.5% Fe0.001maxAs0.003maxTe0.001maxPb0.002maxCu0.001maxHg0.001%maxNi0.002%maxPacking25kg /iron drum selenium,selenium ingot 99.5% min