Product Name: Betamethasone 17-valerate Synonyms: 1,4-Pregnadiene-11b,17a,21-triol-9a-fluoro-16b-methyl-3,20-dione 17-valerate; 9-Fluoro-11beta,17,21-trihydroxy-16beta-methylpregna-1,4-diene-3,20-dione 17-valerate Molecular Formula C27H37FO6 Molecular Weight 476.58 CAS Registry Number 2152-44-5 EINECS 218-439-3 Description White or almost white crystalline powder Specific Rotation +75°～+82° Melting point about 192℃ Loss on drying max. 0.5% Residue on ignition max. 0.2% Chromatographic purity (HPLC) - any individual impurity max. 1.0% - total impurities max. 2.0% Assay(HPLC,basis on drying) 97.0%～103.0% Quality standard: USP32/BP2009/EP7 Packing: 1kg/Aluminum foil bag