Description

(2S)-2-Amino-3-Disulfanyl-Propanoic Acid is a specialized chiral amino acid derivative, also known as L-Cysteine. This compound is a critical building block in organic synthesis and biochemistry, valued for its thiol (-SH) functional group which enables key reactions like disulfide bond formation. It is essential for researchers and manufacturers in the pharmaceutical, biotechnology, and nutraceutical sectors, where it serves as a precursor for peptide synthesis, a stabilizer in formulations, and a vital nutrient.

Application

• Pharmaceutical Intermediates: A key chiral synthon for the production of active pharmaceutical ingredients (APIs), especially in cardioprotective and hepatoprotective drugs.
• Biochemical Research: Used in cell culture media as a source of sulfur and for studying protein folding, enzyme activity, and redox biochemistry.
• Peptide Synthesis: An essential amino acid residue in solid-phase and solution-phase peptide synthesis for creating therapeutic peptides and research tools.
• Nutraceuticals & Dietary Supplements: Incorporated into formulations for its role as an antioxidant and in supporting glutathione synthesis.
• Cosmetic & Personal Care: Acts as a reducing agent in permanent wave solutions (hair perms) and as a skin-conditioning agent.
• Food Industry (as L-Cysteine): Used as a dough conditioner and flavor enhancer in bakery products.
• Chemical Synthesis: Serves as a ligand for metal catalysis and a starting material for synthesizing more complex organosulfur compounds.

Basic Information

Product Name	(2S)-2-Amino-3-Disulfanyl-Propanoic Acid
CAS No.	5652-32-4
Molecular Formula	C3H7NO2S2
Molecular Weight	153.21 g/mol
Synonyms	L-Cysteine; (R)-2-Amino-3-mercaptopropanoic acid; 2-Amino-3-sulfanylpropanoic acid; Cys; C; Thioserine; (2R)-2-Amino-3-sulfanylpropanoic acid; 3-Mercapto-L-alanine; L-2-Amino-3-mercaptopropionic acid; L-β-Mercaptoalanine
EINECS	227-096-6

Quality Control

Our (2S)-2-Amino-3-Disulfanyl-Propanoic Acid is produced under strict quality management systems. Each batch is subjected to comprehensive analytical testing, including HPLC for purity and chiral purity, to ensure it meets the high standards required for research and industrial use. Certificates of Analysis (COA) detailing specific batch results are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. For long-term storage, consider storing under an inert atmosphere such as nitrogen.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.5%
Chiral Purity (HPLC)	≥ 99.0% (L-Isomer)
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.