PT-141 is a man-made ring-shaped peptide seven building blocks long that works on melanocortin receptors, also published as bremelanotide (formula C50H68N14O10, average mass 1,025.2 g/mol, CAS 189691-06-3). PT-141 is sold here for laboratory research in 1 size (10mg), from $40.00 a vial. It is not an FDA-approved medicine. Research use only, and never for people or animals.
PT-141 specifications
| Product name | PT-141 |
|---|---|
| Also sold as | Bremelanotide, PT-141 peptide, peptide PT-141 |
| Formula | C50H68N14O10 |
| Average mass | 1,025.2 g/mol |
| CAS number | 189691-06-3 |
| Physical form | Freeze-dried powder, a solid cake in a sealed vial |
| Appearance | White to off-white cake |
| Sizes on this page | 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 1 size has a published Kovera Labs certificate (10mg, lot LF-21A-2609) |
| 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 PT-141, and what is it used for?
PT-141 is also listed and searched as Bremelanotide, PT-141 peptide, peptide PT-141. They all mean the same compound. Supplier lists write it as PT-141 peptides or peptide PT-141 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 C50H68N14O10, average mass 1025.2 g/mol (PubChem CID 9941379). Those figures are what the identity test on a certificate is read against.
A man-made ring-shaped peptide seven building blocks long that works on melanocortin receptors, also published as bremelanotide.
It switches on melanocortin receptors, with reported activity at MC4R. It came out of a breakdown product of melanotan II and is a chemically different molecule from it.
A registered clinical record exists, and an approved medicine containing bremelanotide exists under its own brand name for one specific use in a defined group of people.
What is sold here is a research chemical and not a drug product. Listing it is not an approval, an equivalence or a safety claim, and this record does not describe use in a person.
PT-141 for sale: 10mg vials, price per mg
PT-141 is sold in 1 size here, 10mg, from $40.00 a vial. PT-141 cost and PT-141 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 |
|---|---|---|---|---|---|
| PT-141 10mg | $40.00$4.00/mg | $36.00a vial · $3.60/mg | $34.00a vial · $3.40/mg | $37.60a vial, shipment 2 on · $3.76/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 $3.20 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 PT-141 Peptide: Five Checks Before You Order.
Where to buy PT-141: what to check before you order from anyone
Where to get PT-141, and how to buy PT-141 online
PT-141 for sale, or PT-141 peptide for sale, means this page: one record, 1 size. You can buy PT-141 online here with guest checkout, and purchase PT-141 or order PT-141 in any size below; verified in-stock orders placed before 12 PM Pacific are dispatched the same day. If the question is where to get PT-141 or how to get PT-141, 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. A PT-141 supplier, vendor or source worth using will show you the lot number and where its certificate can be verified.
Before ordering PT-141 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.
PT-141 reviews
No customer review of PT-141 has been published yet, so there is no star rating here; when real ones exist the number will be the arithmetic of what people wrote. Ordered this record? Leave a review. A person reads every one before it appears.
PT-141 nasal spray, capsules or oral form? What this vial is, and is not
Search results for PT-141 also show nasal spray, capsules, oral form products, under listing titles such as pt-141 nasal spray, pt 141 peptide nasal spray, pt 141 nasal spray reviews, pt 141 spray, pt 141 nasal, pt 141 nasal spray for sale. 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 PT-141 in a sealed glass vial, 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.
PT-141 vs Melanotan II and Kisspeptin-10: different molecules, separate records
PT-141 vs Melanotan 2, or Melanotan 2 vs PT-141, is the comparison people search most, with Kisspeptin-10 close behind, and they are not the same thing. Each is a different molecule with a different formula, mass and research record, and each has its own certificate here.
Melanotan 2 vs PT-141: the same comparison, side by side
| Record | Class | Formula | Avg. mass | Sizes here |
|---|---|---|---|---|
| PT-141 | A man-made ring-shaped peptide seven building blocks long that works on melanocortin receptors, also published as bremelanotide. | C50H68N14O10 | 1025.2 | 10mg from $40.00 |
| Melanotan II | A man-made ring-shaped peptide seven building blocks long that switches on melanocortin receptors indiscriminately. | C50H69N15O9 | 1024.2 | 10mg from $35.00 |
| Kisspeptin-10 | A man-made peptide ten building blocks long, the tail end of kisspeptin. | C63H83N17O14 | 1302.4 | 5mg · 10mg from $60.00 |
Documentation compared in full: PT-141 vs Melanotan 2, side by side.
PT-141 guides and documentation
Written to answer the questions that come up around PT-141 specifically, what its paperwork should show, how it is handled, and how to judge a supplier selling it.
- Melanotan II Storage and Stability: What the Data Covers
- PT-141 certificates of analysis, field by field, and how to check one at the lab
- PT-141: How Identity Is Confirmed in the Laboratory
- PT-141 Storage and Stability: What the Data Covers
- Where to buy PT-141 Peptide: how to vet the supplier and check the lot
The full library, grouped by what you came to answer, is in the laboratory guides.
The PT-141 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. For PT-141 that means a mass spectrum landing on 1,025.2 g/mol for C50H68N14O10, the figure published against PubChem CID 9941379. The cataloged form is Bremelanotide, and the identity test resolves to that rather than to a related molecule with a similar name.
Listings elsewhere describe PT-141 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-21A-2609 | LC-MS | 99.669% (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-21A-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.
Is PT-141 legal? 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.
Whether PT-141 is legal depends on what it is being used for and where. 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.
PT-141 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.
PT-141, bremelanotide, is a ring-shaped seven-building-block relative of alpha-melanocyte-stimulating hormone that switches on the melanocortin receptors MC3R and MC4R. The mechanically interesting point is where it acts. MC4R sits densely in the brain and spinal cord, and the pathway bremelanotide engages is a nerve pathway rather than a blood-vessel one, which makes it a categorically different thing from the PDE5 drugs it gets compared with: those work on muscle and blood flow out in the body, this works on signalling in the brain.
It is a close relative of melanotan II, differing at one end, and that difference greatly reduces its activity at MC1R, the receptor behind pigment production. That is why bremelanotide does not carry melanotan II’s tanning profile. It was approved in 2019 as Vyleesi for low sexual desire in premenopausal women, making it one of only two approved medicines in this catalog.
| Reported observation | Model | Source |
|---|---|---|
| Described as a man-made melanocortin relative of alpha-MSH acting on MC3R and MC4R. In an eighteen-person crossover study, more women reported moderate or high desire after treatment than after placebo. The instrument-measured physical response did not follow: blood flow measured by a probe showed no significant change against placebo. The authors describe the work as preliminary. | randomised double-blind crossover, 18 premenopausal women with female sexual arousal disorder, single intranasal dose | Diamond and colleagues, An effect on the subjective sexual response in premenopausal women with sexual arousal disorder by bremelanotide (PT-141), a melanocortin receptor agonist, Journal of Sexual Medicine (2006)Sponsor-affiliated (Palatin Technologies) with academic co-authors. Note the split result: the subjective measure moved and the objective one did not. |
| A development review from the time records the compound as a modified relative of alpha-MSH then in trials as a nasal spray for erectile dysfunction and female sexual dysfunction. The nasal route was later dropped; the approved product is not a nasal spray. The history is worth knowing because supplier copy still describes formulations that never made it through development. | development review of the clinical program | Hedlund, PT-141 Palatin, Current Opinion in Investigational Drugs (2004) |
Open questions. The receptor identity is settled and the brain-rather-than-blood-vessel mechanism is well supported. What gets said less often is that the evidence for the effect is largely what people reported about themselves. In the study above the self-reported measure moved and the instrument-measured one did not, and that pattern repeats across this literature. It does not make the finding false, but it is a materially weaker kind of evidence than a physical measurement, and readers should know which one they are being shown.
The approved use is narrow and specific, and the trials behind approval were run in that group rather than in people generally. Melanocortin receptors are not confined to one tissue, which is why nausea and flushing are the characteristic effects of this class rather than accidents. As with the other approved molecules here, the licensed product is a manufactured medicine with release testing behind it, and a research vial carrying the name is not that object.
Each row above describes an observation in the stated model. None of it describes what PT-141 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 PT-141: 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 PT-141 sizes stocked here already loaded. It covers laboratory measurement only and contains no administration guidance.
