Synonyms: dihydrotestosterone;androstanolone chemical name: 5a-androstan-17-ol-3-one cas: 521-18-6 einecs: 208-307-3 assay: 99% min. molecular formula:c19h30o2 packing: foil bag or tin. delivery: express courier.description:white crystalline powder character: white crystalline powder.Mp 178-183, refractive index 27.