Description Tin Selenide, Pieces 12mm & smaller, 99.999% (Metals Basis), 5g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance (Color) Gray Appearance (Form) Pieces Assay (Complexometric, as Sn) >59.0% Assay (Metals Basis) 99.999% Identity by X-Ray diffraction Particle Size 12mm & smaller Total Metallic Impurities <0.001% CAS: 1315-06-6 FORMULA: SnSe