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L-Cysteine monohydrochloride

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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
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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
Odor
odorless
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
LogP
0.235 (est)
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)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36
WGK Germany 
2
RTECS 
HA2275000
3-10-23
TSCA 
Yes
HS Code 
29309013
Toxicity
LD50 intraperitoneal in mouse: 1250mg/kg

MSDS

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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

Preparation Products

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