Synonyms: Thiamine Hydrochloride Imp. C (EP), Thiamine Imp. C (EP), 3-[(4-Amino-2-methylpyrimidin-5-yl)methyl]-5-(2-chloroethyl)-4-methylthiazolium Chloride Hydrochloride, Thiamine Hydrochloride Imp. C (EP) as Chloride Hydrochloride, Chlorothiamine Chloride Hydrochloride, Thiamine Hydrochloride Impurity C as Chloride Hydrochloride, Thiamine Impurity C as Chloride Hydrochloride