Name Prednisone Synonyms 1,4-Pregnadiene-17a,21-diol-3,11,20-trione Molecular Formula C21H26O5 Molecular Weight 358.43 CAS Registry Number 53-03-2 EINECS Number 200-160-3 Melting point 236-238°C Boiling point 410.86°C Solubility acetic acid: soluble10mg/mL Density 1.1121 g/cm3 Safety Description S36/37/39;S45 Risk Codes R63