Description

Cysteine, 2-(Mercaptomethyl)- (9Ci) is a specialized, high-purity derivative of the amino acid cysteine, featuring an additional thiol group. This unique molecular structure makes it a valuable building block for synthesizing complex peptides and fine chemicals, particularly where enhanced reactivity or specific chelation properties are required. It is essential for researchers and manufacturers in the pharmaceutical, biotechnology, and advanced material science sectors who require precise molecular tools for drug discovery and development.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the synthesis of novel active pharmaceutical ingredients (APIs), especially in oncology and neurology research.
• Peptide Synthesis: Used in solid-phase and solution-phase peptide synthesis to introduce specific thiol functionalities, enabling disulfide bridge formation or site-specific conjugation.
• Bioconjugation Chemistry: Serves as a linker or functional handle for labeling proteins, antibodies, or other biomolecules with dyes, drugs, or polymers.
• Catalyst Ligand Precursor: Employed in the preparation of specialized ligands for asymmetric catalysis and metal-organic frameworks (MOFs).
• Biochemical Research: Utilized as a substrate or inhibitor in enzymatic studies and as a standard in analytical method development for amino acid analysis.
• Cosmetic Ingredient Synthesis: A precursor for synthesizing peptides and derivatives used in high-end skincare formulations for their antioxidant and skin-renewal properties.

Basic Information

Product Name	Cysteine, 2-(Mercaptomethyl)- (9Ci)
CAS No.	501950-56-7
Molecular Formula	C4H9NO2S2
Molecular Weight	167.25 g/mol
Synonyms	2-(Mercaptomethyl)cysteine; (2R)-2-Amino-3-[(sulfanylmethyl)sulfanyl]propanoic acid; 3-[(Mercaptomethyl)thio]-L-alanine; L-2-Amino-3-((mercaptomethyl)thio)propionic acid; NSC 113928; 2-(Mercaptomethyl)-L-cysteine; A cysteine derivative with an additional thiolmethyl group
EINECS	Contact for details

Quality Control

Every batch of Cysteine, 2-(Mercaptomethyl)- (9Ci) is manufactured under strict quality management systems. We provide comprehensive analytical documentation, including a detailed Certificate of Analysis (COA) confirming identity, purity (typically ≥95% by HPLC), and impurity profiles. Our quality assurance protocols are designed to meet the stringent requirements of research and cGMP-grade manufacturing, ensuring batch-to-batch consistency and traceability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and easily oxidized; for long-term storage, consider storing under an inert atmosphere such as argon or nitrogen. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Optical Rotation	Contact for details
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals	≤ 20 ppm

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