How is PT-141 supplied?

PT-141 is supplied as a lyophilised (freeze-dried) powder in 10 mg vials, for laboratory research use only.

Has this batch of PT-141 been independently tested?

Yes. Lot PX-2431-C was tested at 99.2% by an independent laboratory. The full certificate of analysis is published and searchable by lot code on the verify page, before and after purchase.

Is PT-141 for human use?

No. PT-141 is supplied strictly for in vitro laboratory research. It is not for human or animal consumption, and is not a drug, food, or cosmetic.

PT-141

Name: PT-141
Brand: PepNex
Availability: InStock

Bremelanotide. Supplied in 10 mg vials, lyophilised and ready to reconstitute.

Batch certified

UK stock, same-day

Stored cold, shipped & sealed safely

Strength

How many vials?

2 more vials to save 5%

Add bacteriostatic water

Peptides ship as dry powder — you’ll need this to reconstitute the vial.

£75.01 from free UK delivery

Total£24.99

Ships today

Questions about PT-141? Ask us

For laboratory research use only. Not for human or animal consumption, and not a drug, food, or cosmetic. Sold to qualified researchers and institutions.

About PT-141

Molecular weight: 1025.2 g/mol
CAS number: 189691-06-3

PT-141 (bremelanotide) is a synthetic cyclic heptapeptide and a metabolite (the deaminated, C-terminal free-acid analogue) of melanotan II. In research it is characterised as a melanocortin-receptor agonist with activity at MC1R, MC3R and MC4R, used as a tool to probe central and peripheral melanocortin signalling.

For laboratory research use only. Not for human or veterinary use.

Specifications

Identity

Sequence: not recorded
Molecular formula: C50H68N14O10
Molecular weight: 1025.2 g/mol
CAS number: 189691-06-3

Physical

Form: Lyophilised powder
Appearance: White to off-white powder
Solubility: Soluble in bacteriostatic or sterile water
Storage: Store the lyophilised powder at -20°C, protected from light. Refrigerate reconstituted material at 2 to 8°C and use within its stability window.

This batch

Purity: 99.2%
Lot: PX-2431-C
Test date: May 2026
Testing lab: third-party
Methods: HPLC, LC-MS/MS

Certificate

Certificate · lot PX-2431-C99.2% · HPLC / LC-MS/MS · May 2026

COA · PX-2431-C.pdfIndependent lab report

Handling and storage

Reconstitute with bacteriostatic or sterile water. Store the lyophilised powder at -20°C, protected from light; refrigerate reconstituted material at 2 to 8°C. Handle under standard laboratory conditions.

Literature

An effect on subjective sexual response by bremelanotide (PT-141), a melanocortin receptor agonist
Diamond LE, et al. · Journal of Sexual Medicine · 2006

Common questions about PT-141

What is PT-141?: PT-141 (bremelanotide) is a synthetic cyclic heptapeptide and a metabolite (the deaminated, C-terminal free-acid analogue) of melanotan II. In research it is characterised as a melanocortin-receptor agonist with activity at MC1R, MC3R and MC4R, used as a tool to probe central and peripheral melanocortin signalling.
How is PT-141 supplied?: PT-141 is supplied as a lyophilised (freeze-dried) powder in 10 mg vials, for laboratory research use only.
How should PT-141 be stored and handled?: Reconstitute with bacteriostatic or sterile water. Store the lyophilised powder at -20°C, protected from light; refrigerate reconstituted material at 2 to 8°C. Handle under standard laboratory conditions.
Has this batch of PT-141 been independently tested?: Yes. Lot PX-2431-C was tested at 99.2% by an independent laboratory. The full certificate of analysis is published and searchable by lot code on the verify page, before and after purchase.
Is PT-141 for human use?: No. PT-141 is supplied strictly for in vitro laboratory research. It is not for human or animal consumption, and is not a drug, food, or cosmetic.