.beta.-Aminoethanol hydrochloride 2-Aminoethanol hydrochloride 2002-24-6 Colamine hydrochloride ETHANOLAMINE HYDROCHLORIDE ETHANOLAMINE-HCL Ethanol, 2-amino-, hydrochloride Ethanolamine chloride MEA hydrochloride Monoethanolamine hydrochloride NSC10000