PT-141 10mg — Research-Grade Cyclic Heptapeptide

CAS 189691-06-3 · C₅₀H₆₈N₁₄O₁₀ · MW 1025.2 g/mol

Supplied as a lyophilised powder, this batch of PT-141 (Bremelanotide) is produced for in-vitro research where structural fidelity to the cyclic scaffold matters — the lactam bridge between the Asp and Lys residues is what defines this molecule, so identity confirmation isn’t a formality here.

At a Glance


Pack size	10mg
Sequence	Ac-Nle-cyclo(Asp-His-D-Phe-Arg-Trp-Lys)-OH
Structure	Cyclic heptapeptide, 7 residues
Purity	≥99%, HPLC-verified
Appearance	White to off-white lyophilised solid
Format	Sterile glass vial, sealed
Dispatch	1–2 business days from UK stock

Handling Notes

The cyclic lactam ring is the structural feature that separates PT-141 from a standard linear peptide — it holds up well under proper cold storage, but repeated freeze-thaw cycles and warm handling are still the fastest way to compromise a vial.

Unopened vial: -20°C, dry and dark
Reconstituted solution: 2-8°C, use within 2-3 weeks
Long-term post-reconstitution: aliquot and freeze at -20°C rather than repeat freeze-thaw
Reconstitute with sterile or bacteriostatic water; swirl gently until fully dissolved

Scope of Use

Sold strictly for laboratory and analytical research by qualified professionals. Not manufactured, tested, or labelled for human use, veterinary use, ingestion, or any diagnostic or therapeutic purpose.

Common Questions

How fast does it ship? UK-held stock, same day dispatch if ordered by 1PM.

Is this legal to purchase? Yes, when bought and used for genuine research purposes by an appropriately qualified buyer.

What makes PT-141’s structure distinct? It’s cyclic rather than linear — the ring closure between two internal residues constrains its conformation, which is central to its receptor-binding research interest.

What’s included with each order? Discreet packaging and access to that batch’s HPLC data on request.

Please confirm the following to enter this site

UK peptides

PT-141