Description

S-Cyanoethyl-L-Cysteine is a specialized, high-purity amino acid derivative of significant interest in advanced biochemical synthesis and pharmaceutical research. This compound serves as a crucial chiral building block and a key intermediate in the development of novel therapeutic agents and complex peptides. It is primarily utilized by research institutions, pharmaceutical development labs, and fine chemical manufacturers focused on innovative drug discovery and process chemistry.

Application

• Pharmaceutical Intermediate: A key chiral synthon in the synthesis of novel active pharmaceutical ingredients (APIs), particularly for targeted therapies.
• Peptide Chemistry: Used in the synthesis of modified peptides and peptidomimetics for research into new drug candidates.
• Bioconjugation & Linker Chemistry: Serves as a versatile building block for creating bioconjugates, antibody-drug conjugates (ADCs), and specialized chemical linkers.
• Biochemical Research: Employed in studies of enzyme mechanisms, protein engineering, and as a precursor for other functionalized cysteine derivatives.
• Asymmetric Synthesis: Utilized as a chiral auxiliary or starting material in stereoselective organic synthesis.
• Reference Standard: Serves as a high-purity analytical standard for quality control and method development in pharmaceutical analysis.

Basic Information

Product Name	S-Cyanoethyl-L-Cysteine
CAS No.	3958-13-2
Molecular Formula	C6H10N2O2S
Molecular Weight	174.22 g/mol
Synonyms	L-Cysteine, S-(2-cyanoethyl)-; (R)-2-Amino-3-((2-cyanoethyl)thio)propanoic acid; S-(2-Cyanoethyl)cysteine; 3-[(2-Cyanoethyl)thio]-L-alanine; NSC 113928; S-Cyanoethylcysteine; β-Cyanoethyl-L-cysteine; L-Cysteine S-(β-cyanoethyl) ether
EINECS	223-552-5

Quality Control

Our S-Cyanoethyl-L-Cysteine is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is subjected to comprehensive analytical testing, including chiral purity verification, to meet the stringent requirements of pharmaceutical research and development. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed specifications.

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 product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. For long-term storage, consider desiccated conditions.

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.