CAS 1880366 appears in our catalog under these names: H-Cys-OH · HCl · H2O, L-Cysteine hydrochloride hydrate/ 99.81% (existing batch purity), L-CYSTEINE HYDROCHLORIDE MONOHYDRATE, 98%. Offered by: Creative Peptides, TargetMol, Fluorochem. Available pack sizes: 100g, 250g, 5g, 500g, 1kg.