Bendamustine Impurity A Catalogue B442631 CAS 1219709-86-0 M.W 332.23 M.F C14H19Cl2N3O2 Specifications FAQs Synonyms:4-(5-((2-chloroethyl)amino)-1-methyl-1H-benzo[d]imidazol-2-yl)butanoic acid hydrochloride