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L-Cysteine monohydrochloride

L-Cysteine monohydrochloride Structure
L-Cysteine monohydrochloride structure
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
Molecular Weight:
157.62
MDL Number:
MFCD00064553
MOL File:
52-89-1.mol
MSDS File:
SDS
Last updated:2026-02-02 18:10:39
Product description Number Pack Size Price
L-Cysteine hydrochloride anhydrous, ≥99.0% (RT) 30120 10g $47.9
L-Cysteine hydrochloride anhydrous, ≥99.0% (RT) 30120 50g $159
L-Cysteine hydrochloride ≥98.0% C7477 25g $130
L-Cysteine hydrochloride ≥98.0% C7477 100g $439
L-Cysteine hydrochloride ≥98.0% C7477 1kg $2200
More product size
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L-Cysteine monohydrochloride 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
biological source synthetic
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.
Cosmetics Ingredients Functions HAIR WAVING OR STRAIGHTENING
REDUCING
ANTIOXIDANT
HAIR CONDITIONING
Cosmetic Ingredient Review (CIR) L-Cysteine monohydrochloride (52-89-1)
InChI 1S/C3H7NO2S.ClH/c4-2(1-7)3(5)6;/h2,7H,1,4H2,(H,5,6);1H/t2-;/m0./s1
InChIKey IFQSXNOEEPCSLW-DKWTVANSSA-N
SMILES Cl[H].N[C@@H](CS)C(O)=O
LogP 0.235 (est)
FDA 21 CFR 184.1272; 310.545
CAS DataBase Reference 52-89-1(CAS DataBase Reference)
Substances Added to Food (formerly EAFUS) L-CYSTEINE MONOHYDROCHLORIDE
EWG's Food Scores 1
FDA UNII A9U1687S1S
NIST Chemistry Reference L-cysteine hydrochloride(52-89-1)
EPA Substance Registry System L-Cysteine hydrochloride (52-89-1)
UNSPSC Code 12352209
NACRES NA.77

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS07
Signal word  Warning
Hazard statements  H315-H319-H335
Precautionary statements  P280a-P304+P340-P405-P501a-P261-P305+P351+P338
PPE dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  2
RTECS  HA2275000
F  3-10-23
TSCA  TSCA listed
HS Code  29309013
Storage Class 11 - Combustible Solids
Toxicity LD50 intraperitoneal in mouse: 1250mg/kg
NFPA 704
1
2 0

L-Cysteine monohydrochloride price More Price(55)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 30120 L-Cysteine hydrochloride anhydrous, ≥99.0% (RT) 52-89-1 10g $47.9 2025-07-31 Buy
Sigma-Aldrich 30120 L-Cysteine hydrochloride anhydrous, ≥99.0% (RT) 52-89-1 50g $159 2025-07-31 Buy
Sigma-Aldrich C7477 L-Cysteine hydrochloride ≥98.0% 52-89-1 25g $130 2025-07-31 Buy
Sigma-Aldrich C7477 L-Cysteine hydrochloride ≥98.0% 52-89-1 100g $439 2025-07-31 Buy
Sigma-Aldrich C7477 L-Cysteine hydrochloride ≥98.0% 52-89-1 1kg $2200 2025-07-31 Buy
Product number Packaging Price Buy
30120 10g $47.9 Buy
30120 50g $159 Buy
C7477 25g $130 Buy
C7477 100g $439 Buy
C7477 1kg $2200 Buy

L-Cysteine monohydrochloride Chemical Properties,Uses,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 H-GLY-CYS-OH S-2-Hydroxyethyl-L-cysteine S-(3-Carboxypropyl)-L-cysteine
BOC-CYS-OH (R)-2-Amino-2-carboxyethylmethanethiosulfonate 2-(1-NAPHTHYL)-1,3-THIAZOLIDINE-4-CARBOXYLIC ACID 2-CYCLOHEXYL-THIAZOLIDINE-4-CARBOXYLIC ACID L-2-AMinothiazoline-4-carboxylic Acid
CYSTEINE(4-METHOXYTRITYL)-OH

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L-Cysteine monohydrochloride Suppliers

Global( 860)Suppliers
Supplier Tel Email Country ProdList Advantage
DONBOO AMINO ACID COMPANY
+8618051385538 donboo@donboo.com China 9363 58
Hebei Chuanghai Biotechnology Co., Ltd 		+8615350571055 Sibel@chuanghaibio.com China 8753 58
Wuhan Fortuna Chemical Co., Ltd 		+86-027-59207850 +86-13986145403; info@fortunachem.com China 6009 58
Hebei Chuanghai Biotechnology Co,.LTD 		+86-13131129325 sales1@chuanghaibio.com China 5242 58
Shaanxi TNJONE Pharmaceutical Co., Ltd 		+8618092446649 sarah@tnjone.com China 1143 58
Hebei Longbang Technology Co., LTD 		+86-18633929156 admin@hblongbang.com China 972 58
Shandong Deshang Chemical Co., Ltd. 		+86-0531-8875-2665 +8613153039501 info@deshangchem.com China 661 58
HebeiShuoshengImportandExportco.,Ltd 		+86-18532138899 L18532138899@163.com China 939 58
Capot Chemical Co.,Ltd. 		+86-（0）57185586718; +8613336195806 sales@capot.com China 29735 60
Henan Tianfu Chemical Co.,Ltd. 		+86-0371-55170693 +86-19937530512 info@tianfuchem.com China 21597 55
Supplier Advantage
DONBOO AMINO ACID COMPANY
58
Hebei Chuanghai Biotechnology Co., Ltd 		58
Wuhan Fortuna Chemical Co., Ltd 		58
Hebei Chuanghai Biotechnology Co,.LTD 		58
Shaanxi TNJONE Pharmaceutical Co., Ltd 		58
Hebei Longbang Technology Co., LTD 		58
Shandong Deshang Chemical Co., Ltd. 		58
HebeiShuoshengImportandExportco.,Ltd 		58
Capot Chemical Co.,Ltd. 		60
Henan Tianfu Chemical Co.,Ltd. 		55

Related articles

View Lastest Price from L-Cysteine monohydrochloride manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
L-Cysteine hydrochloride anhydrous pictures 2026-02-03 L-Cysteine hydrochloride anhydrous
52-89-1
 US $0.00 / kg 1kg 98%-102%; AJI 10 TONS WUHAN FORTUNA CHEMICAL CO., LTD
L-Cysteine hydrochloride pictures 2026-02-02 L-Cysteine hydrochloride
52-89-1
 US $70.00 / g 99.86% 10g TargetMol Chemicals Inc.
L-Cysteine hydrochloride anhydrous pictures 2026-01-30 L-Cysteine hydrochloride anhydrous
52-89-1
 US $1.00 / KG 1KG 99% 10 mt Hebei Chuanghai Biotechnology Co., Ltd

L-Cysteine monohydrochloride Spectrum

L-Cysteine hydrochloride anhydrous(52-89-1)1HNMRL-Cysteine hydrochloride anhydrous(52-89-1)13CNMRL-Cysteine hydrochloride anhydrous(52-89-1)IR1L-Cysteine hydrochloride anhydrous(52-89-1)IR2

52-89-1(L-Cysteine monohydrochloride)Related Search:

Topotecan hydrochloride L-Cystine DL-Homocysteine Zirconium dioxide L-Cysteine ethyl ester hydrochloride
L-Cysteine L-Cysteine hydrochloride monohydrate L-Leucine L(+)-Arginine L-CYSTEINE HCL ANHYDROUS
D-cysteine hydrochloride anhydrous S-tert-Butyl-L-cysteine hydrochloride L-CYSTINE DIHYDROCHLORIDE S-(2-AMINOETHYL)-L-CYSTEINE HYDROCHLORIDE Dimethyl L-cystinate dihydrochloride
H-CYS(BZL)-OET HCL L-Cysteine methyl ester hydrochloride diethyl L-cystinate dihydrochloride

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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 L-Cysteine hydrochloride, 98%, anhydrous EK 2367 hydrochloride,l-cystein l-Cysteine hydrochloride anhydrous L-Cystein-hydrochloride wr348 (2R)-2-amino-3-sulfanylpropanoic acid hydron chloride hydrate (2R)-2-amino-3-mercaptopropanoic acid hydrochloride L-Cysteine hydrochloride anhyd Cysteine-HCl-H2O cryst. research grade (R)-2-AMino-3-Mercaptopropanoic acid hydrochloride L-Cysteine hydrochloride Vetec(TM) reagent grade, >=98% COTTON W/ LEAD ACETATE PHE LEAD ACETATE STRIP PHE MERCURIC BROMIDE PAPER PHE L-Cys·HCl L-CYSTEINE-HCL ANHYDROUS BIOTECHNOLO (r)-cysteinehydrochloride (R)-Cysteine-hydrochloride 3-Mercaptoalanine hydrochloride Cystein chloride Cysteine chlorhydrate Cysteine chlorohydrate Cysteine, hydrochloride, L- cysteinechlorhydrate L-(+)-CYSTEINE HYDROCHLORIDE L-CYSTEINE HYDROCHLORIDE L-CYSTEINE HCL L-CYSTEINE MONOHYDROCHLORIDE H-CYS-OH HCL CYS, HCL CYSTEINE HCL CYSTEINE HCL, L- CYSTEINE HYDROCHLORIDE (R)2-AMINO-3-THIOPROPANOIC ACID HYDROCHLORIDE H-Cys-OH¤HC (R)-2-Amino-3-mercaptopropionic acid hydrochloride L-Cysteine hydrochloride anhydrous98.0-102.0% (Titration) L-cysteine hcl cell culture tested L-cysteine HCL MONO L-cysteinyl monohydrochloride L-CYSTEINE HCL B-MERCAPTOALANINE HYD L-CYSTEINE-HCL ANHYDROUS BIOTECHNOLOGY*P L-CysteineHydrochlorideB.P. L-CysteineHydrochloride99+%ForBiochemistry L-CysteinehydrochlorideanhydrousUSP23 L-CYSTEINE HCL ANHYDROUS 40 MESH L-Cystein HCL zR{2-Amino-3-thiopropanoic acid hydrochloride L-Cysteine, hydrochloride (1:1)