CAS 27057-71-2 appears in our catalog under these names: Osmate(2-), hexachloro-, hydrogen (1:2), (OC-6-11)-, Dihydrogen hexachloroosmate(IV) hydrate, Premion«, 99.95% (m. Offered by: Chemat, Thermo Scientific (Alfa Aesar). Available pack sizes: 100mg, 0.5g, 1g.