Description

Boc-L-Cysteic Acid CAS NO 277316-57-1 is a high-purity, protected derivative of the amino acid cysteic acid, featuring a tert-butoxycarbonyl (Boc) protecting group on the α-amino function. This compound is a critical building block in the synthesis of complex peptides and proteins, particularly for introducing sulfonic acid functionality in a controlled manner. It is essential for researchers and manufacturers in the pharmaceutical, biotechnology, and life science sectors who require precise chemical intermediates for drug discovery, peptide-based therapeutics, and biochemical studies.

Application

• Peptide Synthesis: A key protected intermediate in solid-phase and solution-phase peptide synthesis (SPPS) for incorporating cysteic acid residues.
• Pharmaceutical Research: Used in the development of novel peptide-based drugs, enzyme inhibitors, and diagnostic agents.
• Bioconjugation: Serves as a precursor for creating site-specifically modified proteins and antibody-drug conjugates (ADCs).
• Biochemical Studies: Employed in studying protein structure, function, and post-translational modifications involving sulfonation.
• Proteomics Research: Useful as a standard or reagent in mass spectrometry and other analytical techniques for protein analysis.
• Material Science: Potential applications in creating functionalized surfaces and biomaterials.

Basic Information

Product Name	Boc-L-Cysteic Acid
CAS No.	277316-57-1
Molecular Formula	C8H15NO7S
Molecular Weight	269.27 g/mol
Synonyms	(2R)-2-[(tert-Butoxycarbonyl)amino]-3-sulfopropanoic acid; N-(tert-Butoxycarbonyl)-L-cysteic acid; Boc-Cys(SO3H)-OH; Boc-L-Cysteinesulfonic acid; N-Boc-L-cysteic acid; tert-Butyloxycarbonyl-L-cysteic acid; BOC-CYSTEIC ACID; L-Cysteic acid, N-[(1,1-dimethylethoxy)carbonyl]-
EINECS	Contact for details

Quality Control

Our Boc-L-Cysteic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity, chiral analysis for enantiomeric excess, and spectroscopic methods for structural confirmation, to ensure it meets the high standards required for research and pharmaceutical applications. Certificates of Analysis (COA) with detailed specifications are provided for every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C. This product is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions to maintain stability and purity. Keep the container tightly sealed in a desiccator when not in use.

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%
Heavy Metals	≤10 ppm
Residual Solvents (GC)	Complies with ICH guidelines

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