L-Cysteine monohydrochloride

Synonym(s):L-Cysteine hydrochloride monohydrate

CAS NO.：52-89-1
Empirical Formula: C3H8ClNO2S
Molecular Weight: 157.62
MDL number: MFCD00064553
EINECS: 200-157-7
SAFETY DATA SHEET (SDS)
Update Date: 2024-11-15 19:19:13

What is L-Cysteine monohydrochloride?

Chemical properties

solid

The Uses of L-Cysteine monohydrochloride

As dough conditioner.

The Uses of L-Cysteine monohydrochloride

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.]

Properties of L-Cysteine monohydrochloride

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.
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 for L-Cysteine monohydrochloride

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up.