Description

L-Cysteine, L-Cysteinylglycyl-L-Asparaginyl-L-Lysyl-L-Arginyl-L-Threonyl-L-Arginylglycyl-, Cyclic (1→9)-Disulfide is a synthetic, cyclic peptide derivative of L-cysteine, characterized by a specific intramolecular disulfide bridge. This compound is significant for its role as a key intermediate or reference standard in advanced peptide and biopharmaceutical research and development. It is primarily needed by research institutions, pharmaceutical companies, and biotechnology firms engaged in the synthesis, characterization, and study of complex peptide structures, hormone analogs, and novel therapeutic agents.

Application

• Pharmaceutical Research & Development: Serves as a critical building block or reference standard in the synthesis of complex peptide-based drugs and hormone analogs.
• Biochemical Research: Used in studies investigating protein folding, disulfide bond formation, and structure-activity relationships (SAR) of bioactive peptides.
• Process Development: Acts as an intermediate in the scale-up and optimization of synthetic routes for novel therapeutic peptides.
• Analytical Standard: Employed as a high-purity standard for method development and validation in analytical techniques like HPLC and mass spectrometry.
• Peptide Library Synthesis: Utilized in the construction of specialized peptide libraries for drug discovery and screening programs.

Basic Information

Product Name	L-Cysteine, L-Cysteinylglycyl-L-Asparaginyl-L-Lysyl-L-Arginyl-L-Threonyl-L-Arginylglycyl-, Cyclic (1→9)-Disulfide
CAS No.	454487-07-1
Molecular Formula	C33H60N16O12S2
Molecular Weight	913.06 g/mol
Synonyms	Cyclo(L-Cys-Gly-Asn-Lys-Arg-Thr-Arg-Gly); Cys-Gly-Asn-Lys-Arg-Thr-Arg-Gly cyclic (1-9)-disulfide; Cyclic Cystine Octapeptide; H-Cys-Gly-Asn-Lys-Arg-Thr-Arg-Gly-OH (cyclic 1-9 disulfide); L-Cysteine containing cyclic peptide; CAS 454487-07-1
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. We offer material suitable for research and development purposes, with specifications typically meeting or exceeding >95% purity (by HPLC). Every batch is supported by comprehensive analytical data. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (typically 15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions to maintain stability and purity.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC/MS)	Conforms to reference
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Single Impurity (HPLC)	≤ 1.0%
Total Impurities (HPLC)	≤ 5.0%

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