Description

S-(2-Thienyl)-L-Cysteine is a specialized, non-proteinogenic amino acid derivative featuring a thienyl side chain. This compound is a valuable chiral building block and biochemical reagent, prized for its role in modulating protein structure and function. It is primarily utilized by researchers and manufacturers in the pharmaceutical and biotechnology sectors for applications in drug discovery, peptide synthesis, and biochemical studies.

Application

• Pharmaceutical Intermediates: Serves as a key chiral synthon in the research and development of novel active pharmaceutical ingredients (APIs).
• Peptide Synthesis: Used as a modified cysteine residue in solid-phase and solution-phase peptide synthesis to introduce specific structural motifs.
• Biochemical Research: Acts as a tool compound for studying enzyme mechanisms, protein-protein interactions, and redox biology.
• Proteomics & Protein Engineering: Employed in site-specific protein labeling and the creation of proteins with novel properties.
• Ligand Development: Useful in the design of chelating agents and catalysts for asymmetric synthesis.
• Reference Standard: Functions as a high-purity analytical standard for quality control and method development in analytical laboratories.

Basic Information

Product Name	S-(2-Thienyl)-L-Cysteine
CAS No.	405150-23-4
Molecular Formula	C7H9NO2S2
Molecular Weight	203.28 g/mol
Synonyms	(2R)-2-Amino-3-(thiophen-2-ylsulfanyl)propanoic acid; L-Cysteine, S-(2-thienyl)-; S-(Thiophen-2-yl)-L-cysteine; 2-Amino-3-[(2-thienyl)thio]propanoic acid; (R)-2-Amino-3-((thiophen-2-yl)thio)propanoic acid; Thienylcysteine
EINECS	Contact for details

Quality Control

Our S-(2-Thienyl)-L-Cysteine is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chiral purity verification by HPLC, to ensure it meets the high standards required for research and development. Certificates of Analysis (COA) with detailed chromatographic data are provided to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C under an inert atmosphere for long-term stability, as the compound is easily oxidized and light-sensitive.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% (L-Isomer)
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.5%

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