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Oxytocin

Oxytocin

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Oxytocin is a cyclic nonapeptide (nine amino acids) with the molecular formula C43H66N12O12S2 and a molecular weight of 1,007.19 g/mol. Its amino acid sequence — Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2 — forms a ring through a disulfide bond between the two cysteine residues at positions 1 and 6. First synthesized in 1953, it was the first peptide hormone ever produced in a laboratory. Oxytocin is classified as both a neuropeptide and a peptide hormone, naturally produced in the hypothalamus. It is supplied as a white to off-white lyophilized powder, highly soluble in water, and identified by CAS number 50-56-6. This product is strictly for research purposes only.

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Certificate of Analysis

Independent laboratory testing confirms purity and composition of this research peptide.

+ ENDO PASSED
99.99%
Purity
A1023
Batch
June 2026
Date
View Certificate →

Overview

Oxytocin is a cyclic nonapeptide — a chain of nine amino acids arranged in a ring shape, held together by a disulfide bond between two cysteine residues. Its sequence is Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2, with a molecular weight of 1,007.19 g/mol and the formula C43H66N12O12S2. The ring structure formed by the disulfide bridge gives the molecule its characteristic stability.

Oxytocin was first isolated and synthesized in 1953, making it the first polypeptide hormone ever synthesized in a laboratory. The compound is naturally produced in the hypothalamus region of the brain and is classified as both a neuropeptide and a peptide hormone. In its research-grade form, oxytocin appears as a white to off-white lyophilized powder that is highly soluble in water.

This product is strictly for research purposes only.

PubChem Reference: View compound profile on NIH PubChem

This product is strictly for research purposes only. Not approved for human or animal use.

Key Characteristics

MOLECULAR PROFILE

Formula: C43H66N12O12S2

Weight: 1007.19 g/mol

CAS: 50-56-6

Structure: Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly

PHYSICAL PROPERTIES

Form: White to off-white lyophilized powder

Solubility: Highly soluble in water

Alternative Names: α-Hypophamine, Ocytocin, Syntocinon

Storage: Cool, dry place away from light

Size: 5mg

SKU: AXIOM-OXYTOCIN

Categories: Single Peptides

Tags: Research Chemical

This product is strictly for research purposes only. Not for human or animal consumption.

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The statements on this website have not been evaluated by the U.S. Food and Drug Administration. The products and information provided by Axiom Research are not intended to diagnose, treat, cure, or prevent any disease. Axiom Research is a research chemical supplier. We are not a compounding pharmacy or compounding facility as defined under Section 503A of the Federal Food, Drug, and Cosmetic Act, nor are we an outsourcing facility as defined under Section 503B.

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Oxytocin — Axiom Research