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Oxytocin is a high-purity research peptide available in 2mg and 5mg strengths. Widely studied for neuroendocrine physiology, oxytocin receptor signaling, hormone regulation, neuroscience, and experimental peptide research. Third-party tested, COA verified, and intended strictly for laboratory research purposes.
Oxytocin is a naturally occurring peptide hormone studied for its role in neuroendocrine signaling, oxytocin receptor activity, social-behavior pathways, and reproductive physiology.
Neuroendocrine Research
Widely studied for its involvement in signaling between the nervous and endocrine systems.
Oxytocin Receptor Signaling
Investigated for its interaction with oxytocin receptors and associated cellular signaling pathways.
Behavioral Research
Studied in experimental models involving social recognition, bonding, and behavioral signaling.
Reproductive Physiology
Used in laboratory research examining reproductive and neuroendocrine biological mechanisms.
Oxytocin is a nine-residue cyclic peptide with an internal disulfide bridge, produced in the hypothalamus. It differs from vasopressin at only two positions, which is why cross-reactivity between the two receptor systems is a standing consideration in the literature rather than an edge case.
The disulfide bridge is the structural feature worth knowing about for handling: it is a covalent link that can be disturbed by reducing conditions, which is not a concern for the linear peptides in this catalogue.
Handling and reconstitution
Standard lyophilised peptide handling applies. Keep the sealed vial cold and dark until it is used. Reconstitute by running bacteriostatic water slowly down the inside wall of the vial rather than firing it onto the powder cake, and let it dissolve without shaking — swirl gently if it needs help.
The concentration you end up with is set by how much water you add, not by the vial size. Our reconstitution calculator turns vial mass and water volume into a concentration and a syringe reading.
Storage
Sealed and lyophilised: refrigerated, protected from light. In solution: refrigerated, and treat time at room temperature as a cost. Avoid repeated freeze-thaw once reconstituted.
What ships, and what is on the certificate
The vial ships sealed as it was filled. Every compound in the catalogue is tested by an outside laboratory — Vanguard Laboratory in Olympia, Washington — and the certificate is published in full rather than summarised.
The certificate reports chromatographic purity by HPLC with the chromatogram visible, the measured quantity in milligrams, and an endotoxin result by LAL. Measured quantity usually reads slightly above the label, which is normal: fills are targeted high so every vial meets its stated content.
Frequently asked questions
How similar is oxytocin to vasopressin?
They differ at only two of nine positions, which is why cross-reactivity between their receptor systems is a recurring consideration.
Does the disulfide bridge matter for handling?
It is a covalent link within the molecule and can be disturbed by reducing conditions, which is not a concern for linear peptides.
How should it be reconstituted?
Add bacteriostatic water slowly down the inside wall of the vial, then let it dissolve without shaking. The reconstitution calculator will convert vial mass and water volume into a concentration and a syringe reading.
Does it come with a certificate of analysis?
Yes. Every compound is tested by an independent laboratory and the full certificate, chromatogram included, is published on the site rather than summarised.
Is this a medicine?
No. It is sold for in-vitro laboratory research use only. It is not a drug, supplement or cosmetic, and is not for human or veterinary use.
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