Caspofungin acetate 25MG. Caspofungin acetate, CAS number: 179463-17-3, Molecular Formula: C52H88N10O15.2C2HO2, MW: 1213. 42, Purity: greater than or equal to 95%, Appearance: White to off-white solid, Synonym: 1-[(4R, 5S)-5-[(2-Aminoethyl)amino]-N2-(10, 12-dimethyl-1-oxotetradecyl), Size: 25MG