
$27.00 – $34.00Price range: $27.00 through $34.00
Size — 2mgView COA
Quantity
Oxytocin is a synthetic cyclic nonapeptide composed of nine amino acid residues in the sequence Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH₂ (CYIQNCPLG-NH₂), featuring an intramolecular disulfide bridge between the two cysteine residues and a C-terminal primary amide. It is structurally classified within the neurohypophyseal nonapeptide family and is closely related to vasopressin, from which it differs by two amino acid residues.
This product is supplied as a lyophilized powder containing 5 mg net peptide per vial, synthesized by solid-phase peptide synthesis (SPPS) and characterized by HPLC-UV (purity) and LC-MS (identity). It is intended exclusively for in-vitro laboratory research and analytical applications.
In the research literature, oxytocin is referenced in the context of the oxytocin receptor (OXTR), a class A (rhodopsin-type) G-protein-coupled receptor, and is frequently used as a reference peptide in receptor-binding, structure-activity, and peptide-stability investigations.
Orders placed before 12 PM EST ship the same day. Free 2–5 day delivery on all orders over $250. Expedited next-day and 2-day options are available at checkout.
Store lyophilized peptide in a cool, dry place away from direct light (stable 3–4 months unrefrigerated). After reconstitution, refrigerate at 2–8°C for up to 30 days, or freeze at −80°C for long-term storage.
Related Research Compounds
Verified Test Results
Analysed by an accredited third-party laboratory before release. The figures below are transcribed from the certificate for this compound.
Certificate of Analysis
99%
Purity by HPLC
View signed certificate (PDF)Lot-specific COA available — [LINK: Oxytocin Lot OXYT-162-TPL COA]
Third-Party Testing
Reports for this compound as issued by the testing laboratory.
Technical Specifications
Knowledge Base
Answers to the most common questions about peptides, quality, dosing, and ordering.

Everything you need for your research, delivered right to your door.
Research Peptide Vial
Lyophilized powder for maximum stability — 99%+ purity, HPLC tested.
Certificate of Analysis
Batch-specific third-party lab results included with every order.
Secure Fast Shipping
Secured foam box for fast and save delivery.
Our team is available via live chat to help you with anything — product selection, dosing, lab results, or order support.
Chat With Us →Important Research Notice
Not for human, veterinary, or food use. All products sold by True Peptide Labs are intended for laboratory research purposes only, and are supplied exclusively to qualified researchers and institutions. They are not drugs, foods, cosmetics, or medical devices, and have not been evaluated by the Food and Drug Administration.
Nothing on this page constitutes medical advice or a claim of safety or efficacy. Any research literature referenced describes published work on the compound and is not a representation about this product. By purchasing, you confirm that you are a qualified researcher and will use the product in accordance with all applicable laws and regulations.