Description Triosmium Dodecacarbonyl, 98%, 990mg For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance (Color) Yellow Appearance (Form) Crystalline Assay (Elemental Analysis) [C] 15.59% Assay (Optical Purity) 98.0% IR Spectrum Conforms to structure Melting Point 230 °C CAS: 15696-40-9 FORMULA: Os3(CO)12