CAS 7048-04-6 appears in our catalog under these names: L-Cysteine hydrochloride monohydrate, 98%, L-Cysteine Hydrochloride Monohydrate, >95% (HPLC), L–Cysteine hydrochloride hydrate, L-Cysteine hydrochloride monohydrate/ 99%, L-Cysteine hydrochloride monohydrate, 99% . Offered by: Combi-blocks, TRC, GLPBio, Chemat, Thermo Scientific (Alfa Aesar). Available pack sizes: 100g, 500g, 1kg, 5g, 25g, 10g, 500mg, 5kg.