Description

L-Cysteine, S-(Cyanomethyl)- (9Ci) is a specialized derivative of the amino acid L-cysteine, modified with a cyanomethyl group at the sulfur atom. This structural modification imparts unique reactivity, making it a valuable building block and intermediate in advanced organic synthesis and pharmaceutical research. It is primarily sought by industries focused on developing novel compounds, including pharmaceuticals, biochemical research, and fine chemical manufacturing.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of complex drug molecules, particularly those targeting specific enzyme pathways.
• Biochemical Research: Used as a specialized reagent in proteomics and enzyme studies to investigate protein structure and function.
• Peptide Synthesis: Serves as a protected or modified cysteine derivative in solid-phase and solution-phase peptide synthesis.
• Chemical Biology Probes: Employed in the development of activity-based probes and labeling agents for cellular imaging.
• Fine Chemical Synthesis: Acts as a chiral building block for the production of non-natural amino acids and other high-value specialty chemicals.

Basic Information

Product Name	L-Cysteine, S-(Cyanomethyl)- (9Ci)
CAS No.	175131-93-8
Molecular Formula	C5H8N2O2S
Molecular Weight	160.19 g/mol
Synonyms	S-(Cyanomethyl)-L-cysteine; (2R)-2-Amino-3-[(cyanomethyl)sulfanyl]propanoic acid; L-Cysteine S-(cyanomethyl) derivative; 2-Amino-3-[(cyanomethyl)thio]propanoic acid; NSC 401777; Amino acid derivative CN-CH2-S-Cys; Cysteine cyanomethyl thioether
EINECS	Contact for details

Quality Control

Our L-Cysteine, S-(Cyanomethyl)- (9Ci) is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A Certificate of Analysis (COA) detailing specifications such as assay, chiral purity, and impurity profiles is provided with every shipment. We support cGMP and ISO compliant manufacturing for research and commercial-scale applications.

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 compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to minimize exposure to atmospheric humidity.

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	≤ 20 ppm

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