Description

S-(Bromophenyl)Cysteine is a specialized, non-proteinogenic amino acid derivative featuring a brominated aromatic side chain. This compound is a crucial chiral building block in organic synthesis, valued for its ability to introduce both sulfur and halogen functionalities into target molecules. It is primarily utilized by researchers and manufacturers in the pharmaceutical and agrochemical industries for the development of novel active ingredients and complex chemical intermediates.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the research and development of potential drug candidates, particularly in protease inhibitor and receptor modulator programs.
• Agrochemical Synthesis: Used in the creation of advanced herbicides, fungicides, and plant growth regulators that require specific stereochemistry.
• Peptide Modification: Enables site-specific incorporation of bromophenyl groups into synthetic peptides for structure-activity relationship (SAR) studies and bioconjugation.
• Chemical Biology Probe Development: Serves as a precursor for affinity labels, enzyme inhibitors, and other molecular tools used to study biological pathways.
• Material Science Research: Investigated as a monomer or cross-linking agent for the synthesis of novel polymers with specialized optical or electronic properties.
• Catalyst Ligand Synthesis: A building block for creating chiral ligands used in asymmetric catalysis for the production of enantiomerically pure compounds.

Basic Information

Item	Details
Product Name	S-(Bromophenyl)Cysteine
CAS No.	130247-40-4
Molecular Formula	C9H10BrNO2S
Molecular Weight	276.15 g/mol
Synonyms	(R)-2-Amino-3-(4-bromophenylthio)propanoic acid; 4-Bromophenylcysteine; S-(4-Bromophenyl)-L-cysteine; L-Cysteine, S-(4-bromophenyl)-; 4-BPB-Cys; 4-Bromothiophenol-cysteine adduct; Bromophenylcysteine
EINECS	Contact for details

Quality Control

Our S-(Bromophenyl)Cysteine is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including chiral purity assessment by HPLC, to ensure it meets the high standards required for research and process chemistry. A detailed Certificate of Analysis (COA) providing lot-specific data for identity, purity, and chiral excess is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 15-25°C. This material is hygroscopic (moisture-sensitive); ensure the container is sealed tightly after each use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% ee
Loss on Drying	≤ 1.0%
Heavy Metals	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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