Description

Boc-S-Carboxyethyl-L-Cysteine is a protected, non-natural amino acid derivative used as a critical building block in advanced organic synthesis. This compound is essential for researchers and manufacturers requiring high-purity intermediates for the development of novel peptides, bioconjugates, and pharmaceutical candidates. It is primarily utilized by the pharmaceutical, biotechnology, and life science research sectors for applications in drug discovery and chemical biology.

Application

• Peptide Synthesis: A key intermediate for the solid-phase and solution-phase synthesis of custom peptides containing modified cysteine residues.
• Bioconjugation: Used to introduce functional handles (via the carboxyethyl group) for linking peptides to other molecules, such as drugs, polymers, or fluorescent dyes.
• Pharmaceutical Research: Serves as a building block in the development of protease inhibitors, receptor ligands, and other therapeutic peptide mimetics.
• Chemical Biology Probes: Enables the creation of activity-based probes and tools for studying enzyme function and protein-protein interactions.
• Material Science: Can be incorporated into functional polymers and hydrogels to impart specific chemical or biological properties.

Basic Information

Product Name	Boc-S-Carboxyethyl-L-Cysteine
CAS No.	1354484-98-2
Molecular Formula	C₁₁H₁₉NO₆S
Molecular Weight	293.34 g/mol
Synonyms	(2R)-2-[(tert-Butoxycarbonyl)amino]-3-[(2-carboxyethyl)sulfanyl]propanoic acid; N-(tert-Butoxycarbonyl)-S-(2-carboxyethyl)-L-cysteine; Boc-Cys(CH2CH2COOH)-OH; Boc-S-(2-Carboxyethyl)cysteine; Boc-L-Cysteine(S-2-carboxyethyl); N-Boc-S-(2-carboxyethyl)-L-cysteine; tert-Butyloxycarbonyl-S-(2-carboxyethyl)-L-cysteine
EINECS	Contact for details

Quality Control

Our Boc-S-Carboxyethyl-L-Cysteine is manufactured under strict quality control protocols to ensure high chemical purity and batch-to-batch consistency, suitable for demanding research and development applications. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles. We adhere to cGMP principles where applicable to support our clients' regulatory and quality assurance requirements.

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 desiccation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
Assay (HPLC)	≥ 98.0%
Specific Rotation	Contact for details
Water Content (KF)	≤ 1.0%
Heavy Metals	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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