Osmium Tetroxide CMI Part 4008 Osmium Tetroxide CAS Number20816-12-0 Molecular Weight254.2 Molecular FormulaOsO4 Synonyms (1) Osmium(VIII) Oxide Download Specifications PDF Download Safety Data Sheet PDF Download Specifications PDF Download Safety Data Sheet PDF Request A Quote For all quote requests, please email Sales@colonialmetals.com or call 410.398.7200