These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. For research use only.  Legal & Disclaimer

Hypothalamic Neuropeptide · OXTR Agonist

Oxytocin Research Compound

Endogenous nonapeptide originating in the hypothalamus. Research-grade lyophilized vials — HPLC + MS verified by Krause Analytical. For research use only. Not for human use.

2 mg Vial 5 mg Vial 10 mg Vial COA — Krause Analytical Finnrick Pulse Platform Sabrina Runbeck, PA-C
Order Research Sample View COA Library
HPLC + MS Dual Verified ≥99% Purity 3rd Party Tested CAS 50-56-6 MW ~1007 Da

Compound Overview

What Is Oxytocin?

Oxytocin is an endogenous nonapeptide — a nine-amino-acid cyclic peptide — produced in the paraventricular and supraoptic nuclei of the hypothalamus. Following biosynthesis, it is transported to and stored within the posterior pituitary gland (neurohypophysis), from which it is released into systemic circulation.

As a member of the neurohypophysial hormone family, oxytocin acts as an agonist at the oxytocin receptor (OXTR), a G protein-coupled receptor distributed across multiple tissue classes. Peer-reviewed literature has investigated OXTR-mediated signaling cascades in both central nervous system and peripheral tissue contexts across a range of preclinical and in vitro model systems.

Structurally, oxytocin is characterized by a disulfide bridge between cysteine residues at positions 1 and 6, forming a six-membered ring with a three-amino-acid C-terminal tail. This cyclic structure is integral to its receptor-binding geometry and stability under physiological conditions, and has been the subject of published research in neuropeptide conformation studies.

All oxytocin supplied by Sequence Labs is provided as a lyophilized research sample for in vitro and preclinical research purposes. For research use only. Not for human use.

Chemical Profile

Compound Oxytocin
CAS Number 50-56-6
Molecular Formula C₄₃H₆₆N₁₂O₁₂S₂
Molecular Weight ~1007 Da
Peptide Class Nonapeptide
Structure Cyclic (disulfide bridge)
Origin Hypothalamus → Post. Pituitary
Receptor Class OXTR (GPCR)
Purity (SL) ≥99% (HPLC + MS)
Note on structure: The disulfide linkage between Cys¹–Cys⁶ defines the cyclic ring conformation critical to OXTR selectivity. Peer-reviewed literature has examined this structural motif in comparative neuropeptide receptor studies.

Published Research Domains

Research Background

Peer-reviewed literature has investigated oxytocin across multiple preclinical and mechanistic research domains. The following areas reflect published research contexts — not claims regarding human therapeutic outcomes.

OXTR Receptor Mechanism Research

Published research has examined the binding kinetics and downstream signaling cascades mediated by the oxytocin receptor (OXTR) in heterologous expression systems and isolated tissue preparations. Literature has characterized Gq/11-mediated phospholipase C activation and intracellular calcium mobilization in various receptor expression models.

Hypothalamic-Pituitary Axis Research

Peer-reviewed literature has investigated the role of oxytocin neurons within the paraventricular nucleus and their projections in the context of hypothalamic-pituitary axis (HPA) regulation. Published studies in rodent models have examined oxytocinergic pathways in neuroendocrine axis research.

Social Neuroscience Research in Animal Models

Published research has examined the role of central oxytocinergic signaling in animal model paradigms of social behavior neuroscience. Peer-reviewed literature has investigated OXTR distribution in limbic and prefrontal regions in rodent and non-human primate preclinical research contexts.

Uterine Smooth Muscle Research in Preclinical Models

Peer-reviewed literature has investigated the contractile response of isolated uterine smooth muscle preparations to oxytocin in preclinical model systems. Published research has examined receptor density, calcium-dependent contractility, and pharmacological desensitization in vitro and in rodent uterine tissue models.

Neuropeptide Signaling Pathway Research

Published research has examined oxytocin as a model neuropeptide for studying axonal and dendrodendritic peptidergic release mechanisms. Peer-reviewed literature has characterized its co-transmission with classical neurotransmitters in central nervous system circuit research and second-messenger signaling studies.

Browse oxytocin receptor mechanism literature on PubMed →

Research Supply

Sequence Labs Supply — Oxytocin

Each research sample is independently tested by Krause Analytical using HPLC and mass spectrometry. COA delivered via Finnrick Pulse. Catalog reviewed by Sabrina Runbeck, PA-C.

2 mg
Oxytocin · Lyophilized
$35 / vial
  • HPLC + MS verified
  • COA — Krause Analytical
  • Finnrick Pulse platform
  • ≥99% purity
  • Research use only
Order 2 mg Sample
5 mg
Oxytocin · Lyophilized
$45 / vial
  • HPLC + MS verified
  • COA — Krause Analytical
  • Finnrick Pulse platform
  • ≥99% purity
  • Research use only
Order 5 mg Sample
10 mg
Oxytocin · Lyophilized
$65 / vial
  • HPLC + MS verified
  • COA — Krause Analytical
  • Finnrick Pulse platform
  • ≥99% purity
  • Research use only
Order 10 mg Sample
Testing Laboratory
Krause Analytical
COA Platform
Finnrick Pulse
Catalog Review
Sabrina Runbeck, PA-C
Testing Method
HPLC + Mass Spectrometry
Purity Standard
≥99% Verified
Intended Use
Research Use Only

Reconstitution Reference

Preparing the Research Sample

The following is a general reference for in vitro and preclinical research laboratory settings. For research use only. Not for human use.

Allow vial to equilibrate to room temperature before handling. Keep in sealed packaging until ready for use. Avoid moisture exposure during storage.
Introduce solvent by adding bacteriostatic water (BW) slowly along the inner wall of the vial. Avoid directing the solvent stream directly onto the lyophilized research sample cake.
Gently swirl the vial in a slow circular motion until the lyophilized material is fully dissolved. Do not vortex or agitate vigorously, as this may compromise the peptide structure.
Inspect visually for complete dissolution and absence of particulate matter before proceeding with any research application. Store reconstituted research sample at 2–8°C.
Recommended Solvent
Bacteriostatic Water (BW)
Storage (Pre-Reconstitution)
−20°C, desiccated, light-protected
Storage (Post-Reconstitution)
2–8°C, use within 28 days
Form
Lyophilized powder
Intended Use
In vitro / preclinical research only
Research Use Only. The information above is provided solely as a general laboratory reference for qualified researchers working in appropriate in vitro or preclinical research contexts. This information is not intended to constitute, and should not be interpreted as, guidance for human use. Sequence Labs research compounds are not intended for human consumption, clinical application, or therapeutic use of any kind. These products have not been evaluated by the Food and Drug Administration. Not for human use.

Common Questions

Frequently Asked Questions

Oxytocin is an endogenous nonapeptide produced in the hypothalamus and released by the posterior pituitary gland. It is a cyclic 9-amino-acid peptide (molecular formula C₄₃H₆₆N₁₂O₁₂S₂, MW ~1007 Da, CAS 50-56-6) characterized by a disulfide bridge between Cys¹ and Cys⁶. Peer-reviewed literature has investigated its role in hypothalamic-pituitary axis signaling and OXTR-mediated research models.
Oxytocin acts as an agonist at the oxytocin receptor (OXTR), a G protein-coupled receptor (GPCR). Published research has examined OXTR-mediated Gq/11 signaling, phospholipase C activation, and intracellular calcium mobilization in various heterologous and isolated tissue expression systems across multiple preclinical research contexts.
Peer-reviewed literature has investigated oxytocin across five principal research domains: (1) OXTR receptor mechanism research, (2) hypothalamic-pituitary axis research, (3) social neuroscience research in animal models, (4) uterine smooth muscle research in preclinical models, and (5) neuropeptide signaling pathway research. See the Research Background section above or browse the PubMed literature index for primary sources.
Sequence Labs offers oxytocin as a lyophilized research sample in three sizes: 2mg (~$35), 5mg (~$45), and 10mg (~$65). Each vial is independently tested by Krause Analytical using HPLC and mass spectrometry to ≥99% purity. COAs are available via the Finnrick Pulse platform and the catalog has been reviewed by Sabrina Runbeck, PA-C.
For in vitro or preclinical research applications, bacteriostatic water (BW) is the standard solvent used to introduce solvent to the lyophilized research sample. The vial should be equilibrated to room temperature before opening, and the solvent introduced slowly along the inner vial wall. The reconstituted research sample should be stored at 2–8°C and used within 28 days. All information is provided as a general research laboratory reference only. For research use only. Not for human use.
No. Oxytocin supplied by Sequence Labs is strictly for research use only. It is not intended for human consumption, clinical use, or therapeutic application of any kind. These products have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease. Access is restricted to adults 21 years of age or older. For research use only. Not for human use.

Request Oxytocin Research Samples

HPLC + MS verified. COA available via Finnrick Pulse. 2mg, 5mg, and 10mg vials ready to ship. For research use only.

View Products & Pricing Contact Research Team