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L-Cysteine monohydrochloride

L-Cysteine monohydrochloride Basic information
Product Name:L-Cysteine monohydrochloride
Synonyms:L-(+)-α-amino-β-thiopropionic acid;L-β-mercapto;(2R)-2-Amino-3-sulfanylpropanoic acid hydrochloride;(2R)-2-Amino-3-mercaptopropanoic acid·hydrochloric acid;L-Cisteine·hydrochloride;L-Cysteine·hydrochloric acid;L-Cysteine hydrochlo;L-Cysteine hydrochloride anhydrous, extra pure
CAS:52-89-1
MF:C3H8ClNO2S
MW:157.62
EINECS:200-157-7
Product Categories:Amino Acid Derivatives;Amino acidsPeptide Synthesis;Cysteine/Cystine;Amino Acids and Vitamins;Amino AcidsNutrition Research;Reagents and Supplements;L-Amino Acids;Amino acidsIon Channels;NMDA Agonists;Biochemicals Found in Plants;Excitatory Amino Acids;Ionotropic Glutamate Receptor ModulatorsNeurotransmitters;Ligand-Gated Ion Channels;Nutrition Research;Food and Feed Additive;Cysteine [Cys, C];Amino Acids;Nutritional Supplements;52-89-1
Mol File:52-89-1.mol
L-Cysteine monohydrochloride Structure
L-Cysteine monohydrochloride Chemical Properties
Melting point 180°C
alpha 5.5 º (c=8, 6 N HCL)
storage temp. Inert atmosphere,Room Temperature
solubility H2O: 1 M at 20 °C, clear, colorless
form Solid
color White to light brown
Odorodorless
optical activity[α]20/D +6.4±0.3°, c = 5% in 5 M HCl
Water Solubility SOLUBLE
Sensitive Hygroscopic
Merck 14,2781
BRN 3560277
Stability:Stable, but light, moisture and air sensitive. Incompatible with strong oxidizing agents, some metals.
InChIKeyIFQSXNOEEPCSLW-DKWTVANSSA-N
LogP0.235 (est)
CAS DataBase Reference52-89-1(CAS DataBase Reference)
NIST Chemistry ReferenceL-cysteine hydrochloride(52-89-1)
EPA Substance Registry SystemL-Cysteine hydrochloride (52-89-1)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36
WGK Germany 2
RTECS HA2275000
F 3-10-23
TSCA Yes
HS Code 29309013
ToxicityLD50 intraperitoneal in mouse: 1250mg/kg
MSDS Information
ProviderLanguage
L-Cysteine hydrochloride anhydrous English
SigmaAldrich English
ALFA English
L-Cysteine monohydrochloride Usage And Synthesis
Chemical Propertiessolid
UsesAs dough conditioner.
UsesL-Cysteine hydrochloride, anhydrous is widely used as additive in food production. It is used as an antioxidant to promote fermentation and keep the flavor. It is also used in cosmetics and animal feed.
DefinitionChEBI: A hydrochloride obtained by combining L-cysteine with one molar equivalent of hydrogen chloride.
General DescriptionL-cysteine is a sulfur-containing amino acid.
Biochem/physiol ActionsNMDA glutamatergic receptor agonist that is also an agonist at AMPA glutamatergic receptors at high concentrations.
Safety Profile: Moderately toxic by intraperitoneal, intravenous, and possibly other routes. Mutation data reported. When heated to decomposition it emits very toxic fumes of NOx, SOx, and Cl-.
Purification MethodsLikely impurities are cystine and tyrosine. Crystallise the salt from MeOH by adding diethyl ether, or from hot 20% HCl. Dry it under vacuum over P2O5. Hygroscopic. [Beilstein 4 III 1580, 1600.]
L-Cystine Zirconium dioxide TIMTEC-BB SBB000833 DL-Homocysteine L-Cysteine methyl ester hydrochloride L-CYSTEINE HCL ANHYDROUS S-(2-AMINOETHYL)-L-CYSTEINE HYDROCHLORIDE Topotecan hydrochloride H-CYS-ONAM HCL (R)-2,2-DIMETHYL 4-THIAZOLIDINECARBOXYLIC ACID HYDROCHLORIDE H-CYS(BZL)-OME HCL H-CYS(BZL)-OET HCL L-Cystine hydrochloride L-Cysteine monohydrochloride Dimethyl L-cystinate dihydrochloride D-cysteine hydrochloride anhydrous diethyl L-cystinate dihydrochloride H-CYS(ACM)-OH HCL
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