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L-Cysteine hydrochloride monohydrate

Chemical Name:
L-Cysteine hydrochloride monohydrate
Molecular Formula:
Molecular Weight:
MDL Number:
MOL File:
MSDS File:
Last updated:2024-07-12 15:32:57

L-Cysteine hydrochloride monohydrate Properties

Melting point 175°C
alpha +6.0~+7.5゜ (20℃/D)(c=8,6mol/l HCl)(calculated on the dried basis)
Density 1.54 g/cm3
vapor pressure <0.1 hPa (20 °C)
refractive index 6 ° (C=8, 1mol/L HCl)
storage temp. Keep in dark place,Inert atmosphere,Room temperature
solubility H2O: 1 M at 20 °C, clear, colorless
form Solid
color White
PH 0.8-1.2 (100g/l, H2O, 20℃)
PH Range 1 - 2
optical activity [α]20/D +5.6±0.3°, c = 5% in 5 M HCl
Water Solubility Soluble in cold water.
Sensitive Hygroscopic
λmax λ: 260 nm Amax: 1.0
λ: 280 nm Amax: 0.3
Merck 14,2781
BRN 5158059
Stability Stable. Incompatible with strong oxidizing agents, most common metals, hydrogen chloride.
LogP 0.235 (est)
CAS DataBase Reference 7048-04-6(CAS DataBase Reference)


Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
Signal word  Warning
Hazard statements  H319
Precautionary statements  P264-P280-P305+P351+P338-P337+P313
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  3
RTECS  HA2285000
HS Code  29309013

L-Cysteine hydrochloride monohydrate price More Price(54)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 1.02839 L-Cysteine hydrochloride monohydrate for biochemistry 7048-04-6 25g $61.5 2024-03-01 Buy
Sigma-Aldrich 1.02735 L-Cysteine hydrochloride monohydrate EMPROVE? ESSENTIAL Ph Eur,USP 7048-04-6 100g $79 2024-03-01 Buy
Sigma-Aldrich 1.02839 L-Cysteine hydrochloride monohydrate for biochemistry 7048-04-6 100g $100 2024-03-01 Buy
Sigma-Aldrich 1.02839 L-Cysteine hydrochloride monohydrate for biochemistry 7048-04-6 1kg $638 2024-03-01 Buy
Sigma-Aldrich 1.02735 L-Cysteine hydrochloride monohydrate EMPROVE? ESSENTIAL Ph Eur,USP 7048-04-6 3kg $847 2024-03-01 Buy
Product number Packaging Price Buy
1.02839 25g $61.5 Buy
1.02735 100g $79 Buy
1.02839 100g $100 Buy
1.02839 1kg $638 Buy
1.02735 3kg $847 Buy

L-Cysteine hydrochloride monohydrate Chemical Properties,Uses,Production


L-cysteine ​​hydrochloride monohydrate has been used in protocols to isolate dorsal root ganglion neurons (DRG).  It was also used in research to test its effect as an inhibitor of enzymatic browning of apples.

General descriptio

L-cysteine ​​hydrochloride monohydrate (LCHCMH) is a water-soluble salt of the non-essential amino acid L-cysteine. It is widely used in the pharmaceutical industry. The thermodynamic characteristics of LCHCMH in aqueous solution have been reported. [1] It can be crystallized in an orthogonal system with the P212121 space group. Its nonlinear optical (NLO) characteristics have been studied in single crystals grown by unidirectional Sankaranarayanan-Ramasamy (SR) technology.

Chemical Properties

white crystalline powder
	L-Cysteine hydrochloride monohydrate


L-Cysteine hydrochloride monohydrate has been used as a component of yeast dropout media for culturing yeasts. It has also been used as a component of differential reinforced clostridial broth (DRCM) for the isolation of clostridia.


L-Cysteine is a non-essential amino acid that can be synthesized by the human body under normal physiological conditions if a sufficient quantity of methionine is available. L-Cysteine is commonly use d as a precursor in the food and pharmaceutical industries. L-Cysteine is used as a processing aid for baking, as an additive in cigarettes, as well as in the preparation of meat flavours.


L-Cysteine hydrochloride monohydrate is used as a precursor in food, pharmaceutical and personal care products. It is actively involved in the production of flavors such as meat flavor obtained by reacting with sugars. It plays an important role as a key raw material for the manufacture of N-acetyl-L-cysteine, S-carboxymethyl-L-cysteine and L-cysteine base. It is involved in the treatment of liver disease as an antioxidant and antidote. Being an essential amino acid, it used as animal feed especially for sheep, which is responsible the growth of wool.


ChEBI: A hydrate that is the monohydrate form of L-cysteine hydrochloride.

General Description

This product is supplied from Wacker FERMOPURE? material, but is sold for R&D use only, not for drug, household or other uses.

Biochem/physiol Actions

NMDA glutamatergic receptor antagonist.

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 hydrochloride monohydrate Preparation Products And Raw materials

Global( 611)Suppliers
Supplier Tel Email Country ProdList Advantage
+8613063595538 China 9365 58
Hefei TNJ Chemical Industry Co.,Ltd.
0551-65418684 +8618949823763 China 25363 58
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+86-15532196582 +86-15373005021 China 2989 58
Sichuan HongRi Pharma-Tech Co.,Ltd
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View Lastest Price from L-Cysteine hydrochloride monohydrate manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
L-Cys.HCl.H2O pictures 2024-07-15 L-Cys.HCl.H2O
US $0.00-0.00 / kg 1kg 99% 1T Sichuan HongRi Pharma-Tech Co.,Ltd
L-Cysteine hydrochloride monohydrate pictures 2024-07-12 L-Cysteine hydrochloride monohydrate
US $6.80-4.60 / kg 1kg 99% 10 tons Shandong Deshang Chemical Co., Ltd.
L-Cysteine hydrochloride monohydrate pictures 2024-05-31 L-Cysteine hydrochloride monohydrate
US $0.00-0.00 / kg 1kg 0.99 50000kg Hebei Kingfiner Technology Development Co.Ltd
  • L-Cys.HCl.H2O pictures
  • L-Cys.HCl.H2O
  • US $0.00-0.00 / kg
  • 99%
  • Sichuan HongRi Pharma-Tech Co.,Ltd
(R)-(+)-CYSTEINE HYDROCHLORIDE HYDRATE H-L-CYS-OH HCL H2O H-CYS-OH HCL H2O CYSTEINI HYDROCHLORIDUM MONOHYDRICUM 3-MERCAPTO-2-AMINOPROPIONIC ACID HYDROCHLORIDE 3-MERCAPTO-2-AMINOPROPIONIC ACID HYDROCHLORIDE MONOHYDRATE alpha-amino-beta-mercapto-propionic acid hydrochloride monohydrate (R)-(+)-Cysteine hydrate hydrochloride L-Cysteine hydrate hydrochloride L-2-AMINO-3-MERCAPTOPROPANOIC ACID HYDROCHLORIDE, MONOHYDRATE L-2-AMINO-3-MERCAPTOPROPIONIC ACID MONOHYDROCHLORIDE L-CYSTEINE HYDROCHLORIDE 1-HYDRATE L-(+)-CYSTEINE HYDROCHLORIDE, MONOHYDRATE L-CYSTEINE HYDROCHLORIDE MONOHYDRATE L-CYSTEINE HYDROCHLORIDE SALT H2O L-CYSTEINE HYDROCHLORIDE SALT MONOHYDRATE L-CYSTEINE MONOHYDRATE HYDROCHLORIDE L-CYSTEINE MONOHYDROCHLORIDE H2O L-CYSTEINE HCL HYDRATE L(+)-AMino-α-Mercaptopropionic acid hydrochloride L(+)-α-AMino-β-thiopropionic acid hydrochloride L-Cysteine.HCI.H2O L-Cysteine Hydrochloride  L-α-amino-β-merocaptopropanic acid hydrochloride alpha-Amino-beta-mercapto-propionic acid hydrochloride L-Cystene hydrochloride monohydrate L-Cysteine Hydrochloride (200 mg) 2-AMino-3-Mercaptopropionic Acid Hydrochloride Hydrate 3-Mercapto-L-alanine Hydrochloride Hydrate Cystein Hydrochloride Hydrate E 920 Hydrochloride Hydrate Half-cystine Hydrochloride Hydrate L-Cys Hydrochloride Hydrate NSC 8746 Hydrochloride Hydrate R)-2-AMino-3-Mercaptopropanoic Acid Hydrochloride Hydrate Thioserine Hydrochloride Hydrate CYSTEINE HYDROCHLORIDE MONOHYDRATE, PH EUR L-CYSTEINE-HCL-H20 L-CysteineHydrochlorideForBiochemistry L-Cys-OH HCl H-Cys-OH·HCl·H 2 O (Fe≤1 PPM) LowIronL-CysteineHydrochlorideMonohydrate H-CYS-OH HCL H2O (LOW IRON) L-Cysteine hydrochloride monohydrate >99.5% L-CYSTEINE HCL MONOHYDRATE, NATURAL L-Cysteine HCL Monohydrous Cysteine Hydrochloride, Monohydrate, L- Cysteine Hydrochloride, L-(+), Monohydrate β-Mercaptoalanine Hydrochloride Hydrate L-Cysteine Hydrochloride, Monohydrate, USP The L- cysteinehydrochloride Monohydrate L-Cysteine hydrochloride monohydrate Produced by Wacker Chemie AG, Burghausen, Germany, Life Science, 98.5-101.0% (Ph.Eur (2.2.20)) TSA CONTACT BLISTER TWEEN DOUBLE WRAP H-Cys-OH.HCl monohydrate L-Cysteine Hydrochloride Monohydrate, Animal-Free H-Cys-OH¤HCl¤H L-Cys-OH·HCl·H2O L-Cysteine hydrochloride monohydrate from non-animal source≥ 99% (Titration: anhydrous basis)