Antipain dihydrochloride 25MG. Antipain dihydrochloride, CAS: 37682-72-7, MF: C27H44N10O6. 2HCl, Molecular Weight: 677. 62, Purity: greater than or equal to 97%, Appearance: White to off-white solid, Synonym: [(S)-1-Carboxy-2-phenylethyl]-carbamoyl-Arg-Val-arginal. 2HCl, Size: 25MG