CAS 116797-51-4 appears in our catalog under these names: DL–Cysteine Hydrochloride Monohydrate, DL-Cysteine Hydrochloride Monohydrate, >98.0%(T), DL-Cystein hydrochloride hydrate, DL-Cysteine hydrochloride monohydrate, 98.00%, H-DL-Cys-OH HCl H2O 98%. Offered by: GLPBio, TCI, Biosynth, Chemat, Ambeed. Available pack sizes: 100g, 25g, 50g, 10g, 5g, 250g, 500g.