Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 156-57-0, Whether you call it Cysteamine Hydrochloride, 2-Aminoethanethiol Hydrochloride or 2-Mercaptoethylamine Hydrochloride you can be assured the Cysteamine Hydrochloride products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.