1.0 2016-05-22 03:25:34 UTC 2026-04-17 17:29:17 UTC l-Cysteine hydrochloride SmallMolecule l-Cysteine hydrochloride (C3H8ClNO2S) is a compound with an average molecular weight of 157.61 g/mol. l-Cysteine hydrochloride belongs to the amino acids, peptides, and analogues, a subclass of carboxylic acids and derivatives within the organic compounds. Industrially, the compound serves as an antioxidant, softener, conditioner, flavouring, nutrient, leavening agent, filler, and food preservative. It is also used for hair waving or straightening and functions as a reducing agent in both biological and industrial contexts (PMC12602169). The compound is found in or released from 18 recorded sources. These include drinking water and water supply (drinking water), as well as household cleaning and consumer products such as bleaching agents, tobacco product cases, pipe accessories, and non electric simulated smoking devices. Within the category of electrical and electronic equipment, it is associated with magnets, relays, amplifiers, electric switches, and electrically stimulated smoking devices. Additionally, it is found in food, food processing, and cookware, specifically in the preparation of malt, vinegar, wine or sparkling wine, cellar tools, and fermentation processes for beer, among two other sources. The recorded exposure route for this compound is oral. Cysteine hydrochloride C3H8ClNO2S 157.61 156.9964274 (2R)-2-amino-3-sulfanylpropanoic acid hydrochloride L-cysteine hydrochloride 52-89-1 Cl.[H][C@](N)(CS)C(O)=O InChI=1S/C3H7NO2S.ClH/c4-2(1-7)3(5)6;/h2,7H,1,4H2,(H,5,6);1H/t2-;/m0./s1 IFQSXNOEEPCSLW-DKWTVANSSA-N Organic compounds Organic acids and derivatives Carboxylic acids and derivatives Amino acids, peptides, and analogues Cysteine and derivatives Alkylthiols Amino acids Carbonyl compounds Carboxylic acids Hydrocarbon derivatives Hydrochlorides L-alpha-amino acids Monoalkylamines Monocarboxylic acids and derivatives Organic oxides Organopnictogen compounds Aliphatic acyclic compound Alkylthiol Alpha-amino acid Amine Amino acid Carbonyl group Carboxylic acid Cysteine or derivatives Hydrocarbon derivative Hydrochloride L-alpha-amino acid Monocarboxylic acid or derivatives Organic nitrogen compound Organic oxide Organic oxygen compound Organonitrogen compound Organooxygen compound Organopnictogen compound Organosulfur compound Primary aliphatic amine Primary amine Aliphatic acyclic compounds Detected and Not Quantified logp -2.57 ALOGPS logs -0.72 ALOGPS solubility 2.31e+01 g/l ALOGPS logp -2.8 ChemAxon pka_strongest_acidic 2.35 ChemAxon pka_strongest_basic 9.05 ChemAxon iupac (2R)-2-amino-3-sulfanylpropanoic acid hydrochloride ChemAxon average_mass 157.61 ChemAxon mono_mass 156.9964274 ChemAxon smiles Cl.[H][C@](N)(CS)C(O)=O ChemAxon formula C3H8ClNO2S ChemAxon inchi InChI=1S/C3H7NO2S.ClH/c4-2(1-7)3(5)6;/h2,7H,1,4H2,(H,5,6);1H/t2-;/m0./s1 ChemAxon inchikey IFQSXNOEEPCSLW-DKWTVANSSA-N ChemAxon polar_surface_area 63.32 ChemAxon refractivity 28.22 ChemAxon polarizability 11.41 ChemAxon rotatable_bond_count 2 ChemAxon acceptor_count 3 ChemAxon donor_count 3 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon #<HealthEffect::ActiveRecord_Associations_CollectionProxy:0x00007f727b2d5830> 60960 54922