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Research use onlyMelanocortin research
PT 141 Australia: 10mg Bremelanotide Vial
PT-141 Australia listings use the research code for bremelanotide, a cyclic peptide that acts on several melanocortin receptors, including MC4R in the brain and MC1R on pigment cells. It is a close chemical relative of melanotan II. Glow Labs stocks a 10mg freeze-dried vial for lab research only. Orders go out of Gippsland, Victoria, by tracked post and arrive in 2-3 days.
Size
$70 AUD per vial, plus $10 tracked shipping per order
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Research use only. Not for human consumption.
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- Tracked, 2-3 days
- COA on request
Fast delivery, 2-3 days
Orders leave Traralgon in the afternoon during business hours, then travel tracked to your door.
Certificates on request
Certificates of analysis available on request.
Quality guarantee
If a vial arrives damaged, broken or not what you ordered, message us within 7 days with a photo and we'll replace it free.
What it is
Research overview
What PT-141 is
PubChem lists PT-141 as another name for bremelanotide, a ring shaped peptide with a mass of about 1025 g/mol. Its PubChem formula is almost the same as melanotan II: bremelanotide ends in a carboxylic acid where melanotan II ends in an amide.
It binds melanocortin receptors, the same receptor family that alpha-MSH acts on. The Vyleesi label names MC1R and MC4R as the most relevant: MC4R sits on nerve cells in the brain, and MC1R sits on pigment cells.
Sources: PubChem compound record: Bremelanotide (CID 9941379), US National Library of Medicine. PubChem compound record: Melanotan II (CID 92432), US National Library of Medicine. Cosette Pharmaceuticals, VYLEESI (bremelanotide) US prescribing information, DailyMed, US National Library of Medicine.
Questions about PT-141?
Ask on WhatsAppWhat the trials studied
Two identical phase 3 trials, called RECONNECT, were published in Obstetrics and Gynecology in 2019. They enrolled premenopausal women with hypoactive sexual desire disorder and compared bremelanotide with placebo over 24 weeks.
That work supported US approval of a finished medicine, Vyleesi, for that specific condition. The approval covers the finished product only.
Sources: Kingsberg SA et al, Bremelanotide for the treatment of hypoactive sexual desire disorder: two randomized phase 3 trials, Obstet Gynecol, 2019. Cosette Pharmaceuticals, VYLEESI (bremelanotide) US prescribing information, DailyMed, US National Library of Medicine.
PT-141 within the melanocortin family
Melanocortin receptors respond to alpha-MSH and related peptides. Afamelanotide, melanotan II and bremelanotide are all synthetic analogues aimed at this receptor family, each with its own structure.
Bremelanotide shares melanotan II's ring design. PubChem gives the two nearly identical formulas, C50H68N14O10 and C50H69N15O9, so a mass check must be precise to tell them apart.
Afamelanotide, by contrast, is a longer linear chain of about 1647 g/mol.
Sources: PubChem compound record: Bremelanotide (CID 9941379), US National Library of Medicine. PubChem compound record: Melanotan II (CID 92432), US National Library of Medicine. PubChem compound record: Afamelanotide (CID 16197727), US National Library of Medicine.
Storing bremelanotide powder
PT-141 contains a tryptophan, and peptide storage guides flag tryptophan as prone to oxidation. Peptide powders also tend to draw in moisture from the air.
So the dry vial belongs in a freezer at -20 °C or colder, in the dark, with the cap kept tight.
Sources: JPT Peptide Technologies, How to store peptides: best practices for researchers. Bachem, Handling and storage guidelines for peptides, Knowledge Center.
Specification
Product specs
| Name | PT-141 |
|---|---|
| Sizes | 10mg |
| Form | Lyophilised powder |
| Vial | 3 ml glass vial |
| Cap | Brushed silver-grey |
| CAS number | 189691-06-3 |
| Formula | C50H68N14O10 |
| Molar mass | 1025.2 g/mol |
| Structure | A cyclic heptapeptide melanocortin receptor agonist. PubChem lists PT-141 as a synonym of bremelanotide. |
| Storage | Store frozen and sealed, protected from light and moisture. |
| Certificate | On request, how to ask |
| Status | In stock |
| Use | Laboratory research only |
Sources: PubChem compound record: Bremelanotide (CID 9941379), US National Library of Medicine. Bachem, Handling and storage guidelines for peptides, Knowledge Center. JPT Peptide Technologies, How to store peptides: best practices for researchers.
Regulatory status
In Australia
The approval mentioned above is a US approval for the finished medicine Vyleesi.
In Australia, we searched the TGA's product information database on 26 October 2026 and found no document for any product containing bremelanotide. That database holds medicine information leaflets, so it is not the full ARTG register.
The PT-141 vial we sell is a research peptide for laboratory use only.
Sources: Cosette Pharmaceuticals, VYLEESI (bremelanotide) US prescribing information, DailyMed, US National Library of Medicine. Therapeutic Goods Administration, Product and Consumer Medicine Information search, trade names and active ingredients: bremelanotide (0 documents, searched 26 October 2026).
Testing
COA on request
Certificates of analysis are available on request. Ask us on WhatsApp before or after you order.
How ordering works
How to order
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FAQ
Your questions
Is PT-141 the same compound as bremelanotide?
Yes. Bremelanotide is the generic name later given to the peptide first coded PT-141, so both labels point to one molecule.
How is PT-141 related to melanotan II?
The two are near twins. PubChem records show bremelanotide ends in a carboxylic acid, while melanotan II ends in an amide.
Is PT-141 approved in Australia?
We found no sign of one. The TGA's product information search lists no bremelanotide product, though that search is not the full register. Vyleesi is approved in the US for one condition.
How should PT-141 be stored?
Freeze the sealed vial and keep it dark. It holds a tryptophan, which oxidises, and peptide powder in general draws in moisture. Let the vial warm to room temperature before opening and reseal it quickly.
Sources: PubChem compound record: Bremelanotide (CID 9941379), US National Library of Medicine. PubChem compound record: Melanotan II (CID 92432), US National Library of Medicine. Cosette Pharmaceuticals, VYLEESI (bremelanotide) US prescribing information, DailyMed, US National Library of Medicine. Therapeutic Goods Administration, Product and Consumer Medicine Information search, trade names and active ingredients: bremelanotide (0 documents, searched 26 October 2026). JPT Peptide Technologies, How to store peptides: best practices for researchers. Bachem, Handling and storage guidelines for peptides, Knowledge Center.
In the catalogue
Related compounds
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