Product

L-Cysteine monohydrochloride

CAS No.：52-89-1

Other grades of this product :

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 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
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.
InChIKey	IFQSXNOEEPCSLW-DKWTVANSSA-N
CAS DataBase Reference	52-89-1(CAS DataBase Reference)
NIST Chemistry Reference	L-cysteine hydrochloride(52-89-1)
EPA Substance Registry System	L-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
Toxicity	LD50 intraperitoneal in mouse: 1250mg/kg

MSDS Information

Provider	Language
L-Cysteine hydrochloride anhydrous	English
SigmaAldrich	English
ALFA	English

L-Cysteine monohydrochloride Usage And Synthesis

Chemical Properties	solid
Uses	As dough conditioner.
Uses	L-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.
Definition	ChEBI: A hydrochloride obtained by combining L-cysteine with one molar equivalent of hydrogen chloride.
General Description	L-cysteine is a sulfur-containing amino acid.
Biochem/physiol Actions	NMDA 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 Methods	Likely 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-Cysteine monohydrochloride Preparation Products And Raw materials

Raw materials	Ethanol-->Stannous chloride dihydrate-->L-Cystine-->L-Cysteine-->thiazoline
Preparation Products	N-Boc-S-Trityl-L-cysteine-->S-Carboxymethyl-L-Cysteine-->H-GLY-CYS-OH-->S-2-Hydroxyethyl-L-cysteine-->S-(3-Carboxypropyl)-L-cysteine-->BOC-CYS-OH

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