CAS: 20816-12-0 Molecular Formula: O4Os Molecular Weight (g/mol): 254.23 MDL Number: MFCD00011150 InChI Key: VUVGYHUDAICLFK-UHFFFAOYSA-N Synonym: osmium tetroxide,osmium tetraoxide,osmic acid,perosmic oxide,osmic acid anhydride,osmium viii oxide,oso4,perosmic acid anhydride,osmiumtetroxide,osmium oxide, t-4 PubChem CID: 30318 IUPAC Name: tetraoxoosmium SMILES: O=[Os](=O)(=O)=O