Description

Z-Cys-Ome CAS NO 3693-95-6 is a protected cysteine derivative, specifically the Z-protected methyl ester of L-cysteine. This compound is a crucial building block in peptide synthesis, offering a strategic combination of side-chain protection and a reactive ester group for controlled coupling. It is essential for researchers and manufacturers in the pharmaceutical and biotechnology sectors who require high-purity intermediates for the production of complex peptides, APIs, and biochemical tools.

Application

• Peptide Synthesis: A fundamental building block (amino acid derivative) for solid-phase and solution-phase peptide synthesis.
• Pharmaceutical Intermediates: Used in the research and production of active pharmaceutical ingredients (APIs) containing cysteine residues.
• Bioconjugation: Serves as a reagent for introducing protected thiol groups into molecules for subsequent labeling or cross-linking.
• Biochemical Research: Employed in the study of protein structure, function, and disulfide bond formation.
• Protecting Group Strategy: The Z (benzyloxycarbonyl) group provides orthogonal protection that can be removed under mild acidic conditions (e.g., hydrogenolysis).

Basic Information

Product Name	Z-Cys-Ome
CAS No.	3693-95-6
Molecular Formula	C12H15NO4S
Molecular Weight	269.32 g/mol
Synonyms	N-Carbobenzoxy-L-cysteine methyl ester; N-Cbz-L-cysteine methyl ester; (R)-2-((((Benzyloxy)carbonyl)amino)-3-mercaptopropanoic acid methyl ester; Z-L-Cysteine methyl ester; Z-Cys-OMe; Z-Cysteine-OMe; Cbz-Cys-OMe; Nα-Cbz-L-cysteine methyl ester
EINECS	223-016-9

Quality Control

Our Z-Cys-Ome is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity, chiral analysis for enantiomeric excess, and identity confirmation (IR, NMR). We provide Certificates of Analysis (COA) with detailed specifications to ensure the material meets the rigorous standards required for pharmaceutical research and development.

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); keep the container tightly sealed in a desiccated environment to maintain stability and purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Assay (HPLC)	≥98.0%
Optical Rotation [α]	Contact for details
Melting Point	Contact for details
Heavy Metals	< 10 ppm
Residual Solvents	Complies with ICH guidelines

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