Molecular Formula: C₂₀H₂₅NO₂
Synonyms: 17a-Cyanomethyl-17b-hydroxyestra-4, 9-dien-3-one; Dienogest; Dienogestril; Dinagest; 19-Norpregna-4,9-diene-21-nitrile,17-hydroxy-3-oxo-, (17a)-;
Appearance: Pale Yellow Solid
Molecular Weight: 311.418
Density: 1.2 g/cm3
Boiling Point: 549 °C at 760 mmHg
Melting Point: 210-2140C
Flash Point: 285.8 °C
Storage Temperature: -20°C Freezer
Refractive index: 1.589
Solubility: 57.88 mg/L at 25 °C in water
Usage: STS 557 (CAS NO.65928-58-7) can be used as pharmaceutical raw material and intermediate, also used as a medicine in the treatment of endometriosis.