CAS 1879-87-4 is the registry number for 2-((8S,9R,10S,11S,13S,14S,16R,17S)-9-Fluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl dihydrogen phosphate, Dexamethasone Impurity, 98%. Offered by: Fluorochem. Available pack sizes: 100mg.