Description

S-[(4-Ethenylphenyl)Methyl]- L-Cysteine is a specialized, high-purity amino acid derivative featuring a unique styrenyl functional group. This compound is valued for its role as a key chiral building block and a versatile intermediate in advanced organic synthesis. It is primarily sought by research and development teams in the pharmaceutical, agrochemical, and specialty chemical industries for applications requiring precise molecular architecture.

Application

• As a chiral intermediate in the synthesis of novel active pharmaceutical ingredients (APIs) and drug candidates.
• In the development of peptidomimetics and modified peptides for therapeutic and diagnostic applications.
• For the creation of functionalized ligands and monomers used in polymer and material science research.
• As a building block in agrochemical research for the synthesis of bioactive molecules.
• In bioconjugation chemistry for attaching molecules to proteins or other biomolecules via its reactive thiol group.
• For use in asymmetric synthesis to introduce chirality into complex molecular frameworks.

Basic Information

Product Name	S-[(4-Ethenylphenyl)Methyl]- L-Cysteine
CAS No.	36497-69-5
Molecular Formula	C₁₂H₁₅NO₂S
Molecular Weight	237.32 g/mol
Synonyms	S-(4-Vinylbenzyl)-L-cysteine; L-Cysteine, S-[(4-ethenylphenyl)methyl]-; (2R)-2-Amino-3-[(4-ethenylphenyl)methylsulfanyl]propanoic acid; S-(4-Vinylbenzyl)cysteine; S-(p-Vinylbenzyl)-L-cysteine; 4-Vinylbenzyl L-cysteine sulfide; S-(4-Ethenylbenzyl)-L-cysteine
EINECS	Contact for details

Quality Control

Our S-[(4-Ethenylphenyl)Methyl]- L-Cysteine is produced under stringent quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and chiral integrity, to ensure it meets exacting research-grade specifications. Certificates of Analysis (COA) with detailed chromatographic data are provided to guarantee traceability and batch-to-batch consistency for your critical R&D and scale-up projects.

Storage

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

Specification

Item	Specification
Appearance	White to off-white 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%

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