Description

L-Methylcysteine is a specialized sulfur-containing amino acid derivative with the CAS number 95244-61-4. This compound is valued for its role as a biochemical precursor and building block in advanced pharmaceutical synthesis and nutritional research. It is primarily sought by manufacturers and R&D teams in the pharmaceutical, nutraceutical, and fine chemical industries for developing targeted therapeutic agents and high-purity supplements.

Application

• Pharmaceutical Intermediate: A key chiral building block for the synthesis of novel drug candidates, particularly those targeting metabolic and neurological pathways.
• Nutraceutical Formulation: Used in the research and development of advanced dietary supplements and clinical nutrition products for its potential bioactive properties.
• Biochemical Research: Serves as a standard or reagent in enzymatic studies, metabolic pathway analysis, and proteomics research.
• Cosmeceutical Ingredients: Incorporated into the development of specialized skincare formulations for its potential antioxidant and cell-protective characteristics.
• Peptide Synthesis: Employed as a modified cysteine residue in the solid-phase and solution-phase synthesis of custom peptides with enhanced stability.
• Reference Standard: Used as a high-purity analytical standard in quality control laboratories for HPLC, LC-MS, and NMR method development and validation.

Basic Information

Product Name	L-Methylcysteine
CAS No.	95244-61-4
Molecular Formula	C4H9NO2S
Molecular Weight	135.18 g/mol
Synonyms	(2R)-2-Amino-3-(methylsulfanyl)propanoic acid; L-2-Amino-3-(methylthio)propionic acid; L-α-Amino-β-(methylthio)propionic acid; L-Methylcysteine; L-β-Methylthioalanine; (R)-2-Amino-3-(methylthio)propanoic acid; S-Methyl-L-cysteine
EINECS	Contact for details

Quality Control

Our L-Methylcysteine is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chiral purity verification and impurity profiling by HPLC, to ensure it meets exacting standards for pharmaceutical and research applications. Certificates of Analysis (COA) with full traceability are provided with every shipment.

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 tightly sealed after each use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥98.0%
Chiral Purity (HPLC)	≥99.0% (L-Isomer)
Loss on Drying	≤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.