Description

D-Cysteine Hydrochloride is the enantiomer of the common amino acid L-cysteine, specifically as its hydrochloride salt. This compound is critical for research and development in chiral chemistry and biochemistry, where the distinct biological activity of the D-isomer is required. It serves as a key chiral building block and analytical standard for pharmaceutical, nutraceutical, and advanced material synthesis targeting a global market.

Application

• Pharmaceutical Intermediate: Used in the research and synthesis of chiral drugs, peptides, and proprietary compounds where the D-configuration is essential for activity or metabolic stability.
• Biochemical Research: Serves as a critical reagent and standard in enzymatic studies, metabolic pathway analysis, and receptor-ligand interaction research.
• Nutraceutical Development: Employed in the formulation of specialized dietary supplements and amino acid formulations designed for specific metabolic effects.
• Cosmetic & Personal Care: Acts as a precursor for synthesizing active ingredients in hair care and skin care products, leveraging its thiol chemistry.
• Food Science & Flavoring: Utilized as a processing aid and precursor for developing unique flavors and aroma compounds in advanced food technology.
• Chemical Synthesis: Functions as a versatile chiral synthon for producing specialty chemicals, catalysts, and ligands for asymmetric synthesis.

Basic Information

Product Name	D-Cysteine Hydrochloride
CAS No.	207121-46-8
Molecular Formula	C3H8ClNO2S
Molecular Weight	157.62 g/mol
Synonyms	(R)-2-Amino-3-mercaptopropanoic acid hydrochloride; D-Cys-OH·HCl; (R)-Cysteine hydrochloride; D-3-Mercaptoalanine hydrochloride; D-2-Amino-3-sulfhydrylpropionic acid hydrochloride; D-β-Mercaptoalanine hydrochloride; D-α-Amino-β-thiolpropionic acid hydrochloride
EINECS	Contact for details

Quality Control

Our D-Cysteine Hydrochloride is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure high purity and consistency, meeting the stringent requirements for research and production applications. Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥98.0%
Specific Rotation	Contact for details
Loss on Drying	≤0.5%
Residue on Ignition	≤0.1%
Heavy Metals	≤10 ppm

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