ChemicalBook > CAS DataBase List > L-Cysteine monohydrochloride

L-Cysteine monohydrochloride

Product Name: L-Cysteine monohydrochloride
CAS No.: 52-89-1
Chemical Name: L-Cysteine monohydrochloride
Synonyms: L-CYSTEINE HCL;L-CYSTEINE HYDROCHLORIDE;CYSTEINE HYDROCHLORIDE;CYSTEINE HCL;L-cysteine HCL MONO;L-CYSTEINE MONOHYDROCHLORIDE;L-Cys·HCl;Cysteine chlorhydrate;wr348;EK 2367
CBNumber: CB6694980
Molecular Formula: C3H8ClNO2S
Formula Weight: 157.62
MOL File: 52-89-1.mol

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L-Cysteine monohydrochloride Property

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
biological source: synthetic
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

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

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 30120
Product name: L-Cysteine hydrochloride
Purity: anhydrous, ≥99.0% (RT)
Packaging: 10g
Price: $47.9
Updated: 2025/07/31

Sigma-Aldrich

Product number: 30120
Product name: L-Cysteine hydrochloride
Purity: anhydrous, ≥99.0% (RT)
Packaging: 50g
Price: $159
Updated: 2025/07/31

Sigma-Aldrich

Product number: C7477
Product name: L-Cysteine hydrochloride
Purity: ≥98.0%
Packaging: 25g
Price: $130
Updated: 2025/07/31

Sigma-Aldrich

Product number: C7477
Product name: L-Cysteine hydrochloride
Purity: ≥98.0%
Packaging: 100g
Price: $439
Updated: 2025/07/31

Sigma-Aldrich

Product number: C7477
Product name: L-Cysteine hydrochloride
Purity: ≥98.0%
Packaging: 1kg
Price: $2200
Updated: 2025/07/31

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L-Cysteine monohydrochloride Chemical Properties,Usage,Production

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

Stannous chloride dihydrate Ethanol thiazoline L-Cystine L-Cysteine

Preparation Products

N-Boc-S-Trityl-L-cysteine S-Carboxymethyl-L-Cysteine

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View Lastest Price from L-Cysteine monohydrochloride manufacturers

Shaanxi Dideu New Materials Co. Ltd

Product: L-Cysteine monohydrochloride 52-89-1
Price: US $0.00/kg
Min. Order: 1kg
Purity: 98%
Supply Ability: 1000kg
Release date: 2025-06-07

WUHAN FORTUNA CHEMICAL CO., LTD

Product: L-Cysteine hydrochloride anhydrous 52-89-1
Price: US $0.00/kg
Min. Order: 1kg
Purity: 98%-102%; AJI
Supply Ability: 10 TONS
Release date: 2025-04-10

Hebei Chuanghai Biotechnology Co., Ltd

Product: L-Cysteine hydrochloride anhydrous 52-89-1
Price: US $1.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 10 mt
Release date: 2024-10-28

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