QSC RESEARCH GRADE
≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House SPPS5-Region Domestic Shipping
What is PT-141?
PT-141 (Bremelanotide — MC4R-preferring melanocortin agonist) is a 7-amino acid cyclic peptide (Melanotan II metabolite). Melanotan II metabolite with preferential MC4R activity over MC1R. Lacks the cyclic structure producing significant tanning (MC1R) activation, making it more selective for CNS MC4R pathways involved in sexual function and appetite. Acts centrally rather than via vascular mechanisms.
Research Applications
MC4R Selective Pharmacology
Preferential MC4R vs MT-II (MC1R+MC4R) — receptor selectivity research
Sexual Function Biology
Hypothalamic MC4R-mediated arousal pathways
Appetite via MC4R
Central appetite modulation, energy balance studies
CNS Melanocortin
Central vs peripheral melanocortin receptor biology
vs Melanotan II
Receptor selectivity comparison — identical structure, different profile
Quick Specs
| Form | Lyophilized powder |
| Purity | ≥99% by HPLC — every batch |
| CAS Number | 189691-06-3 |
| Molecular Formula | C₅₀H₆₆N₁₂O₁₀ |
| Peptide Type | Synthetic Peptide / Melanocortin Receptor Agonist |
| Identity | MS molecular weight confirmed — every batch |
| COA | Janoshik-independent, publicly verifiable |
| Manufacture | In-house Fmoc SPPS — Qingdao, China |
| Storage | -20°C sealed | 2–8°C reconstituted (2–4 weeks) |
| Shelf Life | 24 months unopened |




