Cysteamine-d4 Hydrochloride is the labelled form of Cysteamine Hydrochloride used as an antioxidant and in radiation therapy.Synonyms:2-Aminoethane-d4-thiol; 2-Mercaptoethylamine-d4 HydrochlorideCAS Number:1219805-04-5Molecular Formula:C₂H₄D₄ClNSMolecular Weight:117.63Melting Point: >62°C (dec.) Solubility:DMSO (Slightly), Methanol (Slightly)Storage:Hygroscopic, -20˚C Freezer, Under Inert Atmosphere