Description

Cys-Tyr-Phe-Gln-Asn-Cys-Pro-Arg CAS NO 37552-33-3 is a synthetic octapeptide with a cyclic disulfide bridge formed by two cysteine residues, structurally related to the hormone oxytocin. This compound is a critical intermediate and reference standard in advanced pharmaceutical research and development, particularly for studying peptide-based therapeutics and neuroendocrine signaling pathways. It is essential for researchers and manufacturers in the pharmaceutical and biotechnology sectors focused on developing novel peptide drugs, diagnostic agents, and biochemical tools.

Application

• Pharmaceutical Research: Serves as a key intermediate in the synthesis of oxytocin analogs and other neuropeptide derivatives for drug discovery programs.
• Biochemical Reference Standard: Used as a high-purity standard for analytical method development, validation, and quality control in peptide analysis (HPLC, MS).
• Neuroscience Studies: Employed in receptor binding assays and functional studies to investigate the structure-activity relationships (SAR) of neurohypophyseal hormones.
• Peptide Library Synthesis: A building block for constructing focused peptide libraries to screen for biological activity and optimize therapeutic profiles.
• Diagnostic Development: Potential use in the development of immunoassays and diagnostic kits targeting oxytocin-related pathways.
• Academic & Contract Research: Supplied to universities and CROs for fundamental research in endocrinology, pharmacology, and medicinal chemistry.

Basic Information

Item	Detail
Product Name	Cys-Tyr-Phe-Gln-Asn-Cys-Pro-Arg
CAS No.	37552-33-3
Molecular Formula	C48H65N13O13S2
Molecular Weight	1080.23 g/mol
Synonyms	H-Cys-Tyr-Phe-Gln-Asn-Cys-Pro-Arg-OH; Cys-Tyr-Phe-Gln-Asn-Cys-Pro-Arg peptide; Oxytocin fragment (4-9); [Cys4, Cys9]-Oxytocin (4-9); Tocinoic acid (Cys4-Cys9); L-Cysteinyl-L-tyrosyl-L-phenylalanyl-L-glutaminyl-L-asparaginyl-L-cysteinyl-L-prolyl-L-arginine; Cyclo(1-6)-[Cys-Tyr-Phe-Gln-Asn-Cys]-Pro-Arg
EINECS	Contact for details

Quality Control

Our Cys-Tyr-Phe-Gln-Asn-Cys-Pro-Arg is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the stringent requirements for research and development use. Certificates of Analysis (COA) with detailed chromatographic data are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below in a dry environment. This product is hygroscopic (moisture-sensitive). For long-term storage, consider desiccant and under an inert atmosphere. Allow the vial to reach room temperature in a desiccator before opening to minimize moisture uptake.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC)	Conforms
Identification (MS)	Conforms
Purity (HPLC)	≥ 95.0%
Single Impurity (HPLC)	≤ 1.0%
Water Content (KF)	≤ 5.0%
Peptide Content	≥ 80.0%
Acetate Content (HPIC)	≤ 10.0%

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