L-Cysteine CAS NO.52-90-4

L-Cysteine (CAS No. 52-90-4) is a high-purity amino acid with the molecular formula C₃H₇NO₂S and a molecular weight of 121.15 g/mol. It serves as a key building block in biochemical, nutritional, and pharmaceutical applications, offering versatile functionality in both health and industrial sectors.

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TECHNICAL SPECIFICATIONS

Item	Specification
Product Name	L-Cysteine
CAS NO.	52-90-4
Appearance	White crystalline powder or granules
Molecular Formula	C₃H₇NO₂S
Molecular Weight	121.15 g/mol
Amino Acid Sequence	H-Cys-OH (Non-peptide amino acid)
Purity (RP-HPLC)	≥95%
Solubility	Soluble in water, ammonia, and alkaline solutions; slightly soluble in ethanol; insoluble in ether and acetone
Endotoxin	<1.0 EU/mg
Biological Activity	A sulfur-containing amino acid with antioxidant, detoxifying, and cellular protective properties; also serves as a precursor in glutathione synthesis and as a reducing agent in biochemical and pharmaceutical applications.
Storage Conditions	Store at 2-8°C, protected from light and moisture, under inert atmosphere to prevent oxidation.
Stock Location	Stock in USA
MOQ	1 kg

1.MECHANISM OF ACTION

L-Cysteine functions as a precursor for glutathione synthesis, a major intracellular antioxidant that neutralizes reactive oxygen species and supports cellular defense against oxidative stress. Its thiol group also participates in disulfide bond formation, contributing to protein structure stabilization and enzymatic activity regulation.

2.PRODUCT INDICATIONS

This amino acid is widely used in dietary supplements to support immune function, detoxification, and antioxidant status. In pharmaceuticals, it serves as a mucolytic agent and stabilizer in formulations, while in cosmetics, it supports skin health and collagen synthesis for anti-aging and texture improvement.

3.CLINICAL EFFICACY OF PRODUCT

Clinical studies indicate that L-Cysteine supplementation enhances systemic antioxidant capacity, improves markers of oxidative stress, and supports skin barrier function. Its use in drug formulations has been shown to improve stability and bioavailability, contributing to therapeutic outcomes in respiratory, metabolic, and dermatological applications.

4.DELIVERY & SHIPPING

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