.beta.-Mercaptoethylamine hydrochloride 1-Aminoethane-2-thiol hydrochloride 156-57-0 2-Aminoethanethiol hydrochloride 2-Mercaptoethylamine hydrochloride 2-Mercaptoethylammonium chloride A-889 Cysteamine hydrochloride Ethanethiol, 2-amino-, hydrochloride Ethylamine, 2-mercapto-, hydrochloride MEA Mercamine hydrochloride Mercaptamine Mercaptoethylamine hydrochloride Merkamin hydrochloride NSC25116 WLN: Z2SH & GH