ChemicalBook >> CAS DataBase List >>L-Cysteine monohydrochloride
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-Cysteine hydrochloride anhydrous;H-CYS-OH HCL;L-Cysteine HCI;Cysteine chlorhydrate
- CBNumber:
- CB6694980
- Molecular Formula:
- C3H8ClNO2S
- Molecular Weight:
- 157.62
- MDL Number:
- MFCD00064553
- MOL File:
- 52-89-1.mol
- MSDS File:
- SDS
- TDS File:
- TDS
Last updated:2026-07-25 07:39:42
| Melting point | 180°C |
|---|---|
| alpha | 5.5 º (c=8, 6 N HCL) |
| FLAVIS Number | 17.032 | L-Cysteine hydrochloride |
| 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. |
| 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) |
| CAS DataBase Reference | 52-89-1(CAS DataBase Reference) |
| Substances Added to Food (formerly EAFUS) | L-CYSTEINE MONOHYDROCHLORIDE |
| FDA 21 CFR | 184.1272; 310.545 |
| 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) |  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 | |||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
|
L-Cysteine monohydrochloride price More Price(88)
| 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 | $50.6 | 2026-04-30 | Buy |
| Sigma-Aldrich | 30120 | L-Cysteine hydrochloride anhydrous, ≥99.0% (RT) | 52-89-1 | 50g | $167 | 2026-04-30 | Buy |
| Usbiological | C9005 | L-Cysteine Hydrochloride Anhydrous | 52-89-1 | 100g | $134 | 2026-06-03 | Buy |
| Usbiological | C9005 | L-Cysteine Hydrochloride Anhydrous | 52-89-1 | 250g | $269 | 2026-06-03 | Buy |
| Usbiological | C9005 | L-Cysteine Hydrochloride Anhydrous | 52-89-1 | 500g | $389 | 2026-06-03 | 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
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
1of3
Global Suppliers ( 927)
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Jiangsu Dongju Biotechnology Co. , Ltd. | 15152114979 | 2805239892@qq.com | China | 519 | 58 |
| Nanjing songguan Biotechnology Co., Ltd. | 13584088977 | 2714748392@qq.com | China | 609 | 58 |
| Wuxi Bikang Bioengineering Co., Ltd | 0510-80245888 400-0510-518 | 1258079079@qq.com | China | 46 | 58 |
| Watson Biotechnology Co.,Ltd | 027-59207879 1972026995 18140587686 | sales@3600chem.com | China | 4146 | 55 |
| Shaanxi Chenming Biotechnology Co., Ltd | 15529026321 | 2709392183@qq.com | China | 1133 | 58 |
| Hebei Lihua Biotechnology Co. , Ltd. | 15127018080 | 3119446261@qq.com | China | 484 | 58 |
| Jiangsu Aofu Biotechnology Co. , Ltd. | 18362074750 13914497230 | 3199449839@qq.com | China | 500 | 58 |
| Hebei chuangzhiyuan biotechnology co., LTD | 13012111162 | 2792365312@qq.com | China | 923 | 58 |
| SHANGHAI YUANJU BIO-TECH CO., LTD | 62750277 15618798178 | 362310313@qq.com | China | 469 | 58 |
| Shanghai Boyle Chemical Co., Ltd. | 021-50182298 021-50180596 | sales@boylechem.com | China | 2202 | 55 |
Related articles
- Exploring the Versatile Applications and Properties of L-Cysteine Hydrochloride Anhydrous in Industrial and Biochemical Fields
- L-Cysteine hydrochloride anhydrous is a multifaceted compound with broad applications across several industries.
- Jul 1,2024
View Latest Price from L-Cysteine monohydrochloride manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-10-14 | L-Cysteine hydrochloride anhydrous
52-89-1
|
1kg | 98%-102%; AJI | 10 TONS | WUHAN FORTUNA CHEMICAL CO., LTD | ||
 |
2026-09-01 | L-Cysteine Monohydrochloride
52-89-1
|
1kg | 99% | 10000kg | Shaanxi TNJONE Pharmaceutical Co., Ltd | ||
 |
2026-07-24 | L-Cysteine hydrochloride
52-89-1
|
$70.00 | 99.89% | 10g | TargetMol Chemicals Inc. |
-
- L-Cysteine hydrochloride anhydrous
52-89-1
- $0.00
- 98%-102%; AJI
- WUHAN FORTUNA CHEMICAL CO., LTD
-
- L-Cysteine Monohydrochloride
52-89-1
- $0.00
- 99%
- Shaanxi TNJONE Pharmaceutical Co., Ltd
-
- L-Cysteine hydrochloride
52-89-1
- $70.00
- 99.89%
- TargetMol Chemicals Inc.
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