Masteron | Drostanolone Propionate Basic Info CAS: 521-12-0 Alias: Masteron; 17b-Hydroxy-2a-methyl-5a-androstan-3-one propionate, Dromostanolone Propionate Molecular Formula: C23H36O3 Molecular Weight: 360.53 Appearance: White or white crystalline powder Purity : 99%min Grade : Pharmaceutical Grade Storage: Shading, confined preservation Usage : pharmaceutical material, Steroid hormone, Anabolic. As a male hormone and anabolic hormones. What is Masteron | Drostanolone Propionate ? Drostanolone propionate (brand names Masteron, …