Description

Methyl Dl-Cysteinate Hydrochloride is a key derivative of the amino acid cysteine, widely utilized as a versatile building block and precursor in advanced chemical synthesis. Its primary commercial value lies in providing a protected and reactive form of cysteine, essential for creating complex molecules in controlled environments. This compound is particularly critical for research and development laboratories, pharmaceutical intermediates, and fine chemical manufacturers seeking reliable, high-purity raw materials for peptide synthesis and biochemical applications.

Application

• Pharmaceutical Intermediate: Serves as a crucial precursor in the synthesis of active pharmaceutical ingredients (APIs) and complex drug molecules.
• Peptide Synthesis: Used as a protected cysteine derivative in solid-phase and solution-phase peptide synthesis to construct specific peptide sequences.
• Biochemical Research: Acts as a reagent in biochemical studies and proteomics research for protein modification and analysis.
• Fine Chemical Production: Employed as a chiral building block for the manufacture of specialty chemicals and advanced organic compounds.
• Nutritional Supplement Precursor: Can be used in the development of precursors for certain nutraceuticals and dietary supplements.
• Cosmetic Ingredient Synthesis: Finds application in the synthesis of certain active ingredients for hair care and skin care formulations.

Basic Information

Product Name	Methyl Dl-Cysteinate Hydrochloride
CAS No.	5714-80-7
Molecular Formula	C4H9NO2S • HCl
Molecular Weight	171.64 g/mol (Free base: 135.18)
Synonyms	DL-Cysteine methyl ester hydrochloride; Methyl DL-cysteinate HCl; Methyl ester of DL-cysteine hydrochloride; H-Cys-OMe • HCl; DL-Cysteine methyl ester monohydrochloride; 2-Amino-3-mercaptopropionic acid methyl ester hydrochloride; (RS)-2-Amino-3-sulfanylpropanoic acid methyl ester hydrochloride
EINECS	227-190-8

Quality Control

Our Methyl Dl-Cysteinate Hydrochloride is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity. We employ advanced analytical techniques, including HPLC and NMR, to verify identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, specific rotation, and impurity profiles is provided with each shipment to support your quality assurance and regulatory compliance needs.

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). This product is hygroscopic (moisture-sensitive) and must be kept under dry conditions to prevent degradation. For long-term storage, consider using a desiccator.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Specific Rotation	Contact for details
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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