Description

(S)-2-Methylcysteine Hydrochloride is a high-purity, non-proteinogenic amino acid derivative of significant interest in advanced chemical synthesis and pharmaceutical research. This chiral building block is valued for its role in constructing complex molecules with specific stereochemical configurations, which is critical for developing bioactive compounds. It is primarily utilized by research institutions and pharmaceutical companies engaged in peptide chemistry, drug discovery, and the development of novel therapeutic agents.

Application

• Pharmaceutical Intermediate: A key chiral synthon in the research and development of new active pharmaceutical ingredients (APIs), particularly for peptide-based drugs.
• Peptide Synthesis: Used as a modified cysteine residue to introduce specific structural features, enhance stability, or alter the pharmacokinetic properties of synthetic peptides.
• Biochemical Research: Serves as a tool compound in enzymatic studies and metabolic pathway investigations due to its unique methylated side chain.
• Ligand and Catalyst Development: Employed in the synthesis of chiral ligands for asymmetric catalysis and organometallic complexes.
• Reference Standard: Used as a high-purity analytical standard in quality control laboratories for method development and validation.

Basic Information

Product Name	(S)-2-Methylcysteine Hydrochloride
CAS No.	151062-55-4
Molecular Formula	C4H9NO2S • HCl
Molecular Weight	171.65 g/mol
Synonyms	(2S)-2-Amino-2-methyl-3-sulfanylpropanoic acid hydrochloride; L-2-Methylcysteine HCl; (S)-2-Methyl-L-cysteine hydrochloride; 2-Methylcysteine monohydrochloride; (S)-2-Amino-2-methyl-3-mercaptopropionic acid hydrochloride; 2-Methyl-DL-cysteine hydrochloride (related); β-Methylcysteine hydrochloride
EINECS	Contact for details

Quality Control

Our (S)-2-Methylcysteine Hydrochloride is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, chiral purity, and impurity profiles. We adhere to relevant industry standards for fine chemicals and can provide material suitable for research and development purposes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place 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%
Chiral Purity (HPLC)	≥ 99.0% ee
Water Content (KF)	≤ 1.0%
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.