Description

Cysteine, 2-Methyl- (8Ci,9Ci) CAS NO 22681-73-8 is a specialized sulfur-containing amino acid derivative, structurally related to cysteine with an additional methyl group. This modification imparts unique steric and electronic properties, making it a valuable chiral building block and intermediate in advanced organic synthesis. It is essential for research and development chemists in the pharmaceutical, agrochemical, and fine chemical industries who require high-purity, non-proteinogenic amino acids for constructing complex molecules, developing novel active ingredients, or studying biochemical pathways.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the synthesis of novel drug candidates, particularly in protease inhibitor research and peptide mimetics.
• Agrochemical Synthesis: Used in the development of advanced herbicides, fungicides, and plant growth regulators that incorporate modified amino acid structures.
• Biochemical Research: Serves as a precursor or standard in metabolic studies, enzyme mechanism investigations, and proteomics research.
• Peptide Chemistry: Employed in solid-phase and solution-phase peptide synthesis to introduce sterically hindered, modified cysteine residues into peptide sequences.
• Fine Chemical Production: Acts as a building block for specialty chemicals, catalysts, and ligands used in asymmetric synthesis.
• Nutritional Science Research: Investigated for its potential role in sulfur metabolism and as a modified dietary component in specialized studies.

Basic Information

Product Name	Cysteine, 2-Methyl- (8Ci,9Ci)
CAS No.	22681-73-8
Molecular Formula	C4H9NO2S
Molecular Weight	135.19 g/mol
Synonyms	2-Methylcysteine; 3-Amino-2-methyl-2-mercaptopropanoic acid; 2-Amino-3-mercapto-2-methylpropanoic acid; (R,S)-2-Methylcysteine; DL-2-Methylcysteine; 2-Methyl-DL-cysteine; α-Methylcysteine; β-Mercapto-α-methylalanine
EINECS	Contact for details

Quality Control

Our Cysteine, 2-Methyl- is produced under a strict quality management system. Each batch is subjected to comprehensive analytical testing, including HPLC for purity and chiral purity assessment, IR and NMR for structural confirmation, and specific tests for residual solvents and heavy metals. We provide full traceability and Certificates of Analysis (COA) are available for every shipment, ensuring the material meets the stringent requirements for research and cGMP intermediate applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. For long-term storage, consider using desiccants or an inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity	Contact for details
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%

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