Oxytocin is a hormone nine building blocks long, supplied as the acetate salt (formula C43H66N12O12S2, average mass 1,007.2 g/mol, CAS 50-56-6). Oxytocin Acetate is sold here for laboratory research in 3 sizes (2mg to 10mg), from $35.00 a vial. It is not an FDA-approved medicine. Research use only, and never for people or animals.
Oxytocin specifications
| Product name | Oxytocin Acetate |
|---|---|
| Also sold as | Oxytocin Acetate, Oxytocin peptide |
| Formula | C43H66N12O12S2 |
| Average mass | 1,007.2 g/mol |
| CAS number | 50-56-6 |
| Physical form | Freeze-dried powder, a solid cake in a sealed vial |
| Appearance | White to off-white cake |
| Sizes on this page | 2mg · 5mg · 10mg |
| Purity specification | ≥99% by RP-HPLC. The number for the lot you receive is whatever its own certificate says. |
| Identity check | Mass spectrometry, read against the mass this compound should have |
| Net content | Weighed per lot and reported separately from purity |
| Lot documentation | 1 of 3 sizes has a published Kovera Labs certificate (10mg, lot LF-20C-2609); the other 2 are in testing |
| Storage | Sealed, cold and out of the light |
| Ships from | Santa Ana, California by USPS with tracking on every order, same business day on verified in-stock orders placed before 12 PM Pacific |
| Intended use | Laboratory research only. Not for human or animal use. |
What is Oxytocin, and what is it used for?
Oxytocin is also listed and searched as Oxytocin Acetate, Oxytocin peptide. They all mean the same compound. Supplier lists write it as Oxytocin peptides or peptide Oxytocin as well; every one of those is this record. A name is not a test, which is why the lot record further down counts for more than the wording on a label.
Chemically: molecular formula C43H66N12O12S2, average mass 1007.2 g/mol (PubChem CID 439302). This product is the acetate salt, so a lot certificate reports the salt rather than the free base figures above.
A hormone nine building blocks long, supplied as the acetate salt.
It works on the oxytocin receptor. The peptide has a sulfur-to-sulfur bridge holding its shape, and that bridge is the part most easily damaged in handling.
A very large body of basic and clinical research on oxytocin exists. Approved medicines containing oxytocin exist for specific uses.
What is sold here is a research chemical and not a drug product. The sulfur bridge makes the molecule sensitive to conditions that break it, so identity paperwork matters more than usual.
Oxytocin for sale: 2mg, 5mg and 10mg vials, price per mg
Oxytocin is sold in 3 sizes here, 2mg, 5mg and 10mg, from $35.00 a vial. Oxytocin cost and Oxytocin price per mg by size are in the table, at each volume tier and on subscription; the per-mg figure under each price is the one that compares across sizes.
Volume and subscription pricing by size
| Size | One vial | 10–19 vials−10% | 20 vials−15% | Subscribe monthly−6% from shipment 2 | Availability |
|---|---|---|---|---|---|
| Oxytocin 2mg | $35.00$17.50/mg | $31.50a vial · $15.75/mg | $29.75a vial · $14.88/mg | $32.90a vial, shipment 2 on · $16.45/mg | Backordered — waitlist |
| Oxytocin 5mg | $40.00$8.00/mg | $36.00a vial · $7.20/mg | $34.00a vial · $6.80/mg | $37.60a vial, shipment 2 on · $7.52/mg | Backordered — waitlist |
| Oxytocin 10mg | $45.00$4.50/mg | $40.50a vial · $4.05/mg | $38.25a vial · $3.83/mg | $42.30a vial, shipment 2 on · $4.23/mg | In stock |
Volume tiers are per size and do not combine across sizes (see bulk pricing). Subscribe & Save takes 6% every month, 4% every 2 months or 2% every 3 months off from shipment 2, two shipments minimum, and stacks on the volume tier: the lowest this record ever bills is $3.60 per mg, twenty 10mg vials on a monthly subscription from shipment 2 onward.
Nothing is added at checkout except the USPS shipping you choose; dispatch and delivery are the same on every order. The cost-per-milligram tool ranks the whole catalog by price per mg. The certificate walked through field by field: Where to Buy Oxytocin Peptide: Five Checks Before You Order.
Where to buy Oxytocin: what to check before you order from anyone
Where to get Oxytocin, and how to buy Oxytocin online
Oxytocin for sale, or Oxytocin peptide for sale, means this page: one record, 3 sizes. You can buy Oxytocin online here with guest checkout; verified in-stock orders placed before 12 PM Pacific are dispatched the same day. If the question is where to get Oxytocin or how to get Oxytocin, the answer for a US laboratory is a supplier who publishes the certificate before you pay, which is the first of the five checks that follow.
Before ordering Oxytocin from anyone, us included, run the 5 checks on verifying a certificate; the first is that the report resolves on the laboratory's own site, and a seller who cannot pass them is asking for the trust a certificate exists to replace.
Oxytocin nasal spray, capsules or sublingual? What this vial is, and is not
Search results for Oxytocin also show nasal spray, capsules, sublingual products, under listing titles such as oxytocin nasal spray, oxytocin spray, oxytocin pills, oxytocin sublingual, oxytocin troche, oxytocin pill. Those are finished consumer goods made and marketed by other companies, and none of them is what this page sells. This record is freeze-dried Oxytocin in a sealed glass vial, 2mg, 5mg and 10mg, with a lot certificate, supplied for laboratory work. Its certificate describes that powder, not a capsule, spray or cream, which carry other ingredients and sit under different rules.
Oxytocin guides and documentation
Written to answer the questions that come up around Oxytocin specifically, what its paperwork should show, how it is handled, and how to judge a supplier selling it.
- Oxytocin acetate certificates of analysis, field by field, and how to check one at the lab
- Oxytocin Acetate: How Identity Is Confirmed in the Laboratory
- Oxytocin Acetate Storage and Stability: What the Data Covers
The full library, grouped by what you came to answer, is in the laboratory guides.
The Oxytocin certificate: lot, purity, identity, and how to verify it
A certificate answers identity, purity and net content as three separate questions, each with the method that produced it and the date it was run, how to read one covers what each field does and does not cover. The figure usually quoted for Oxytocin is 1,007.2 g/mol for C43H66N12O12S2, from PubChem CID 439302, and it does not describe what is in this vial. This product is the acetate salt, so a lot certificate reports the salt rather than the free base figures above. So the mass on the lot certificate is the one to read; a listing that quotes the published figure for this material is quoting the wrong molecule.
Listings elsewhere describe Oxytocin Acetate as an acetate, an arginate salt or an N-acetyl form. Those are different chemical forms with different masses, and a certificate identifies which one was actually tested. The form of the lot on this page is whatever its certificate states; it is not assumed from a listing name, ours included.
| Size | Lot | Identity method | Purity | Endotoxin · sterility · fentanyl | Test date |
|---|---|---|---|---|---|
| 10mg | LF-20C-2609 | LC-MS | 99.648% (RP-HPLC, C18, DAD @ 214 nm) | Pass · pass · not detected | 2026-10-07 |
Testing by Kovera Labs. Every batch tested on or after October 1, 2026 includes endotoxin, sterility and fentanyl screening, in addition to identity, purity and net content. Open the report, then confirm it on the issuing laboratory's own site. If the identifier does not resolve there, or resolves to a different lot than the one printed on your vial, the document is worthless however convincing it looks.
- Certificate for lot LF-20C-2609 · Report PDF · Endotoxin report · Sterility report · Verify at Kovera Labs
The lot number on the certificate must match the lot printed on the vial you received. That match is the only thing tying the document to your material. Net content is reported separately from purity, because a vial can be highly pure and still hold less material than its label states.
Solution arithmetic for the bench, with no administration guidance: the vial concentration calculator, preset to Oxytocin Acetate.
Is Oxytocin a prescription drug? FDA status, and what this listing is
FDA status, and what this listing is Not an FDA-approved drug product
The FDA has not approved this compound for anything, and nothing in this catalog is a medicine.
Status verified 2026-08-25. Check the primary source before relying on this summary.
It is sold as laboratory material under the research-use restriction below. Being listed is not an approval, and not a claim that it is safe, effective or right for any purpose. LabFirst is not a pharmacy or a compounding facility, this vial is not a compounded medicine, and no prescription is involved, because it is not sold for use in anyone.
Oxytocin research: what the published studies examine
Status: No FDA-approved application. This compound is sold as laboratory material. Where research on it has been published, it sits at the animal, cell or early-human stage, and this record does not summarize what it found. A supplier is not a neutral judge of evidence about its own catalog.
Oxytocin is nine building blocks long with a sulfur-to-sulfur bridge that closes six of them into a ring, leaving a tail of three. It differs from vasopressin at only two positions, and that is the source of one of its most consequential properties: it still binds vasopressin receptors reasonably well, so the two systems cannot be cleanly separated. It works on the oxytocin receptor, which signals mainly by releasing calcium inside the cell, and the amount of that receptor is tightly controlled rather than fixed.
In the uterus it changes by orders of magnitude across pregnancy under the control of sex hormones. That control matters more than the peptide’s own pharmacology in many situations, because the same amount of peptide does very different things depending on how much receptor the tissue is currently showing. Oxytocin is an approved medicine with long-established use in childbirth.
| Reported observation | Model | Source |
|---|---|---|
| A thorough review of the oxytocin receptor covering its structure, how it passes on its signal, where it appears in the body and how its amount is controlled, including its need for cholesterol in the membrane to bind tightly and the way hormones and species differences change how much receptor is present. | review of receptor pharmacology and physiology | Gimpl and Fahrenholz, The oxytocin receptor system: structure, function, and regulation, Physiological Reviews (2001)The standard reference for this receptor. Predates most of the behavioral literature, which is an advantage for reading the pharmacology on its own terms. |
Open questions. Oxytocin has an unusual evidence profile. Its effects on the body are well described and it has decades of established clinical use, while the social and behavioral research that drives most current interest is considerably weaker than its public reputation suggests. Several widely repeated findings in that area have replicated poorly. Two mechanical facts explain part of the difficulty.
Oxytocin does not readily cross the blood-brain barrier, so the relationship between giving it into the body and what reaches the brain is genuinely uncertain, and that is the central unsolved problem in the behavioral work. And because oxytocin and vasopressin differ at only two positions, real cross-reaction at vasopressin receptors makes it hard to pin any observed effect on the oxytocin receptor specifically. Receptor levels are also under strong hormonal control, so responses depend on the state of the tissue rather than being fixed.
The approved product is a manufactured medicine with release testing behind it. A research vial carrying the name is a different object, and lot-level identity and purity are what a certificate can speak to.
Each row above describes an observation in the stated model. None of it describes what Oxytocin Acetate would do in a person or an animal outside that model, and none of it is a recommendation to use it for anything.
How to store Oxytocin: refrigeration and shelf life
Keep the sealed vial cold and out of the light and it stays as it left the lab. Once it is mixed into a solution, how long it holds up depends on the compound, what it was mixed with, how strong the solution is and how cold it is kept — too many variables for anyone to print one shelf life on a label. So laboratories write the date on whatever they prepare and keep their own record of it.
For solution preparation arithmetic on the bench, concentration, per-graduation values and molarity, use the vial concentration calculator, which opens with the Oxytocin Acetate sizes stocked here already loaded. It covers laboratory measurement only and contains no administration guidance.
