Clopidogrel EP Impurity F HCl Catalogue L620421 CAS 141109-19-5 M.W 309.81 36.46 M.F C15H16ClNO2S. HCl Specifications FAQs Methyl (S)-2-(2-chlorophenyl)-2-((2-(thiophen-2-yl)ethyl)amino) acetate, hydrochloride (1:1)