Description

S-(2-Hydroxyethylmercapto)-L-Cysteine is a specialized organosulfur compound derived from the amino acid L-cysteine, featuring a hydroxyethylthio side chain. This unique structure makes it a valuable intermediate and building block in advanced pharmaceutical synthesis and biochemical research. It is primarily utilized by research institutions and manufacturers in the pharmaceutical, biotechnology, and fine chemical sectors for developing novel therapeutic agents and biochemical tools.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel drug candidates, particularly those targeting metabolic pathways or requiring thiol-based functionalization.
• Biochemical Research: Used as a precursor or reagent in studying enzyme mechanisms, protein modification, and redox biology due to its reactive thiol and hydroxyl groups.
• Peptide Synthesis: Serves as a modified cysteine derivative for introducing specific side-chain functionalities into synthetic peptides and peptidomimetics.
• Chelating Agent Precursor: Utilized in the development of ligands and chelating agents for metal ions in catalytic or diagnostic applications.
• Cosmetic Ingredient Synthesis: Intermediate in the production of advanced active ingredients for hair care and skin care formulations that leverage thiol chemistry.
• Nutritional Supplement Research: Investigated as a potential precursor or analog in the study of sulfur-containing amino acid supplements.

Basic Information

Product Name	S-(2-Hydroxyethylmercapto)-L-Cysteine
CAS No.	38254-63-6
Molecular Formula	C5H11NO3S2
Molecular Weight	197.27 g/mol
Synonyms	L-Cysteine, S-(2-hydroxyethyl)thio-; 2-[(2-Amino-2-carboxyethyl)thio]ethanol; S-(2-Hydroxyethyl)-L-cysteine; (R)-2-Amino-3-((2-hydroxyethyl)thio)propanoic acid; HET-Cys; 2-Hydroxyethyl L-cysteinyl sulfide; NSC 113935; S-(β-Hydroxyethyl)-L-cysteine
EINECS	Contact for details

Quality Control

Our S-(2-Hydroxyethylmercapto)-L-Cysteine is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity, chiral analysis, and identity confirmation, to ensure it meets the high standards required for research and synthesis. Certificates of Analysis (COA) detailing all specifications are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed in a dry environment to prevent moisture absorption and degradation. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Optical Rotation	Specific range available on COA
Loss on Drying	≤ 1.0%
Heavy Metals	≤ 20 ppm
Residue on Ignition	≤ 0.1%
Chiral Purity	≥ 99.0% (L-isomer)

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