Description

Boc-Cys(Bzl)-Osu CAS NO 85097-54-7 is a high-purity, protected amino acid derivative, specifically N-α-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine N-hydroxysuccinimide ester. This compound is a critical building block in solid-phase peptide synthesis (SPPS), enabling the controlled and efficient incorporation of cysteine residues while protecting its reactive thiol side chain. It is essential for researchers and manufacturers in the pharmaceutical and biotechnology sectors who require precise and reliable reagents for developing therapeutic peptides, diagnostic agents, and biochemical probes.

Application

• Solid-Phase Peptide Synthesis (SPPS): A key reagent for the controlled introduction of protected cysteine into peptide chains.
• Pharmaceutical Intermediates: Used in the research and production of peptide-based active pharmaceutical ingredients (APIs) and drug candidates.
• Bioconjugation: Serves as a versatile linker for attaching peptides to other molecules, surfaces, or carriers in bioconjugate chemistry.
• Biochemical Research: Employed in the study of protein structure, function, and protein-protein interactions that involve cysteine residues.
• Antibody-Drug Conjugate (ADC) Development: Facilitates the site-specific conjugation of cytotoxic payloads to antibodies via engineered cysteine residues.
• Material Science: Used to create functionalized surfaces and biomaterials with specific peptide motifs for cell adhesion or sensing applications.

Basic Information

Product Name	Boc-Cys(Bzl)-Osu
CAS No.	85097-54-7
Molecular Formula	C20H26N2O6S
Molecular Weight	422.50 g/mol
Synonyms	N-α-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine N-hydroxysuccinimide ester; Boc-S-benzyl-L-cysteine N-succinimidyl ester; Boc-Cys(Bzl)-OSu; N-Boc-S-benzylcysteine N-hydroxysuccinimide ester; (S)-2-((tert-Butoxycarbonyl)amino)-3-(benzylthio)propanoic acid 2,5-dioxopyrrolidin-1-yl ester; Boc-Cys(Bzl)-ONSu; Boc-L-Cys(Bzl)-OSu
EINECS	Contact for details

Quality Control

Our Boc-Cys(Bzl)-Osu is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity assessment, chiral analysis to confirm enantiomeric purity, and identity confirmation via spectroscopic methods. A Certificate of Analysis (COA) detailing all specifications and test results is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 15-25°C. This product is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions to maintain stability and purity. For long-term storage, consider storing under an inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥98.0%
Chiral Purity (HPLC)	≥99.0% (L-isomer)
Water Content (KF)	≤0.5%
Melting Point	Contact for details

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