CAS: 6533-00-2 Formula: C21H28O2 Molecular Weight: 312.45 Synonyms: 13-Ethyl-17A-ethynyl-17b-hydroxy-4-gonen-3-one; DL-Norgestrel; Methylnorethindrone; A-Norgestrel; EINECS: 229-433-5 Density: 1.139 g/cm3 Melting Point: 239-241 ° C(lit. ) Boiling Point: 459.139 ° C at 760 mmHg Flash Point: 195.446 ° C Appearance: White solid Purity: 99%