Name: PT-141 (Bremelanotide) 10mg (10 Vials / Kit)
Brand: HK Peptide
SKU: HK-P41
Price: 55.00 USD
Availability: InStock

What is PT-141 (Bremelanotide)?

PT-141 is a synthetic cyclic peptide derived from Melanotan II, differing by the absence of a C-terminal amide group. Its active form, bremelanotide, is the approved active ingredient in a prescription treatment for a specific female sexual-desire condition.

How it is understood to work

Unlike Melanotan II’s broader melanocortin activity, PT-141 acts primarily through MC3 and MC4 melanocortin receptors in the hypothalamus, modulating central nervous system pathways involved in sexual desire and arousal rather than acting on peripheral vascular or pigmentation targets.

Research status

Clinical trials of bremelanotide have examined its effects on sexual-desire disorders and supported its approval as a prescription medicine in some markets; broader research also explores melanocortin receptor signaling in appetite and other CNS pathways. Research-grade material sold here is intended for laboratory study, separate from the approved pharmaceutical product.

This listing: HK Peptide PT-141 (Bremelanotide)

Brand: HK Peptide
Kit: 10 vials × 10 mg (100 mg in total)
Price per vial: $5.50
Price per mg: $0.55
Also sold by: Uther Peptide 10mg $75.00

Lab testing

HK Peptide published a Janoshik #106004 report for this compound. Test: Purity & Content (HPLC). Result: 99.91% purity · 10.73 mg. Tested Feb 9, 2026. Verification key QK7MHVGZMV2K can be checked at janoshik.com.

View the report · How to read it (Testing 101) · Every report for this compound

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

Specifications

Compound: PT-141 (Bremelanotide)
Also known as: Bremelanotide
Class: Melanocortin receptor agonist
Form: Lyophilized (freeze-dried) powder
Molecular formula: C₅₀H₆₈N₁₄O₁₀
Molecular weight: 1025.2 g/mol
Stated purity: ≥99% (HPLC)
Appearance: White lyophilized powder

Handling & storage

Supplied as a lyophilized powder; store unopened vials at -20 C protected from light, and after reconstitution with bacteriostatic water keep refrigerated and use within the timeframe defined by the study protocol.

Concentration check: adding 2 ml of bacteriostatic water to one 10 mg vial gives 5 mg/ml. The Research Lab calculator in your dashboard works this out for any volume.

Questions

How does PT-141 differ from Melanotan II?

PT-141 lacks the C-terminal amide present in Melanotan II, a structural change that shifts its receptor activity toward MC3/MC4-mediated central effects and away from the MC1-receptor-driven pigmentation effects associated with Melanotan II.

Is PT-141 the same molecule as the approved medicine?

Yes, bremelanotide is the active ingredient in that approved prescription product; the material sold here is a separate research-grade preparation intended for laboratory use, not clinical administration.

How much PT-141 (Bremelanotide) is in this kit?

10 vials of 10 mg each, so 100 mg in total. The lab testing section above shows what the brand’s tested vial actually contained.

For laboratory research use only. Not for human or veterinary use. Nothing on this page is medical advice.