PT141
PT-141 (Bremelanotide) is a synthetic cyclic peptide acting as a melanocortin receptor agonist at MC4R and MC3R, supplied as a pre-loaded multi-dose injector pen for research and laboratory use only.
Sequence: Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH. It is derived from the Melanotan II scaffold, differing at the C-terminus where the amide is replaced by a hydroxyl — a single change that published work associates with its narrower receptor selectivity.
Every batch is HPLC-verified by an independent laboratory. Certificates of Analysis are published on the product page as each batch is verified — ask us if you need the report for a specific batch. Store at 2–8 °C in the dark.
Not for human or veterinary use. Not intended to diagnose, treat, cure or prevent any disease.
Shipping & Returns
Shipping & Returns
FAQ
FAQ
Dosing Chart
Dosing Chart
Frequently Bought Together
Every batch is tested by an independent lab
PT141 is analysed by HPLC through Janoshik Analytical — an independent laboratory, not our own. Certificates of Analysis are published on the product page as each batch is verified — this one is still being processed. If you need the report for a specific batch before ordering, ask us and we will get it to you.
Independently assayed
HPLC analysis by a third-party lab, per batch.
Batch-traceable
The COA identifies the specific batch you receive.
Available on request
Ask us for the report on a specific batch.
Need the batch documentation before you order? Ask us for it · Research use only
Why it matters.
Melanocortin peptide.
A cyclic heptapeptide agonist at central melanocortin receptors.
Verified by Janoshik.
Independent HPLC + MS testing. Report linked above.
Reference-grade.
Lyophilised powder. Sealed, labelled, batch-traceable.
How it works
Three receptors. One molecule.
Reference data
Inside the pen.
The molecular profile, confirmed by independent analysis.
Dosing & reconstitution calculator
Enter your own values to work out concentration, volume and clicks. A calculation tool only — not dosing guidance.
For research and laboratory use only. This tool performs arithmetic on the values you enter and does not constitute dosing, medical, or veterinary advice. Always verify calculations independently.
Sources
Cited, not claimed.
Every reference below is publicly available, peer-reviewed.
FAQ's
What is PT-141?
What is PT-141?
How is PT-141 related to Melanotan II?
How is PT-141 related to Melanotan II?
What does 'melanocortin receptor agonist' mean?
What does 'melanocortin receptor agonist' mean?
Is this compound third-party tested?
Is this compound third-party tested?
What is a Certificate of Analysis, and why does it matter?
What is a Certificate of Analysis, and why does it matter?
How should PT-141 be stored?
How should PT-141 be stored?
Is this product intended for human use?
Is this product intended for human use?
How quickly is it shipped?
How quickly is it shipped?








