If a supplied lot fails agreed specifications, we’ll replace it at no cost or refund its purchase price in full.
Quality test failed? Free replacement or full refund.
Off-spec? Free replacement or full refund.
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Posterior-pituitary neuropeptide hormone · regulated
Supply and ordering
Ask sales about Oxytocin Acetate availability, order quantities, packaging, and batch documentation. Include other catalog items in the same inquiry if you are planning a combined or recurring order.
Overview
Oxytocin is a nonapeptide hormone (Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH₂) synthesized in the magnocellular neurons of the hypothalamic paraventricular and supraoptic nuclei and released from the posterior pituitary into systemic circulation. The molecule's defining structural feature is the disulfide bridge between Cys1 and Cys6, creating a cyclic 6-residue core with a 3-residue C-terminal tail, this cyclic structure is essential for receptor binding and is the diagnostic identity check on a properly synthesized oxytocin batch. Oxytocin is approved as a prescription drug in essentially all major jurisdictions for obstetric indications (labor induction, postpartum hemorrhage control) and is studied across social-behavior, stress-response, pair-bonding, and smooth-muscle research contexts. PeptideXpo supplies Oxytocin as a lyophilized powder to a ≥99.0% HPLC purity specification. The disulfide-cyclized structure requires careful oxidative folding during synthesis, the linear precursor must be cyclized under controlled conditions to favor the correct intramolecular disulfide over scrambled intermolecular by-products. Every released lot comes with its batch COA covering peak-integration HPLC purity and mass spec confirming the cyclized mass (1007.19 g/mol average, 2 Da lower than the reduced linear form due to the disulfide formation); water content and counter-ion are available on request and listed on the COA when tested. Oxytocin's regulated status worldwide means buyers must demonstrate appropriate licensing for their jurisdiction; the documentation packet supports both compounding pharmacy and research workflows.
Specifications
Also available as a nasal spray (US stock)
Besides lyophilized vials, Oxytocin Acetate is stocked in the US as a ready-to-use nasal spray.
Documentation available on request
Each picture is a low-resolution preview of a report's first page, with batch and report numbers covered. For the full, clear report, ask our sales team, naming the product and strength.
Batch COAOxytocin Acetate 2 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COAOxytocin Acetate 5 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COAOxytocin Acetate 10 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Third-party reportOxytocin 2 mg
HPLC purity · MS identity
Third-party laboratory, Tianjin, China
Full, clear copy from sales
Third-party reportOxytocin 5 mg
HPLC purity · MS identity
Third-party laboratory, Tianjin, China
Full, clear copy from sales
Independent test fails? Full refund. How it works
Regulatory note
Highly regulated hormone approved as a prescription drug in essentially all major jurisdictions (brand names Pitocin, Syntocinon, and generic equivalents). Sold only to qualified buyers with appropriate licensing in their jurisdiction. Order requires compliance review and may require import authorization documentation for the destination market.
Frequently asked questions
Oxytocin's biological activity depends entirely on the cyclic structure formed by the Cys1-Cys6 disulfide bond, the linear (reduced) form has essentially no receptor binding activity. The disulfide formation during synthesis is a controlled oxidative-folding step that must favor the intramolecular cyclization over intermolecular disulfide formation between molecules. The analytical confirmation is a mass-spec check at the cyclized mass (2 Da lower than the linear reduced form) plus an HPLC retention-time check against a reference standard, since the cyclic and linear forms elute at different positions. Buyers should request the COA to confirm both checks were performed and the cyclized form is the dominant species.
Bulk oxytocin sources support two main research workflows: (1) social-behavior and pair-bonding research in rodent models (intranasal or central administration), where the bulk active is needed for preparation of dosing solutions outside the volume-constraint of finished-drug ampoules, and (2) smooth-muscle and reproductive-tissue research in isolated organ-bath or cell-culture contexts. For both workflows, the batch COA confirms the cyclized active form by HPLC and MS, and endotoxin testing (LAL) on the specific batch for in vivo work is available on request and listed on the COA when tested. Buyers with compounding pharmacy use cases should reference local regulator-approved finished products rather than bulk active where the finished drug is available.
Yes. Oxytocin Acetate is also stocked as a ready-to-use nasal spray (2 mg) in 10 mL or 20 mL bottles, from 10 bottles of each. These orders ship from our US stock; ask our sales team for details and a quote.
Send any vial from your order to an independent laboratory of your choice. If the report shows the product does not meet the specification on its COA — purity below the stated minimum, or an identity that does not match — share the report with our sales team and we refund that product in full.
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