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PT-141 (bremelanotide) is a synthetic cyclic heptapeptide belonging to the melanocortin peptide family. It was derived from the research compound Melanotan II and first described in the early 2000s. The molecule features a lactam bridge — a cyclic bond between amino acid side chains — that constrains it into a ring shape. It has the molecular formula C50H68N14O10, a weight of 1,025.2 g/mol, and CAS number 189691-06-3. Classified as a melanocortin receptor ligand, it is structurally related to compounds in the MC1R through MC5R family. Supplied as a white to off-white lyophilized powder, soluble in water. This product is strictly for research purposes only.
ℹ️ Note: 1 kit includes 10 vials
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PT-141, also known as bremelanotide, is a synthetic cyclic heptapeptide — a ring-shaped chain of seven amino acids. It belongs to the melanocortin peptide family and was originally derived from the earlier research compound Melanotan II through metabolic modification. PT-141 was first described in the early 2000s. Its structure includes a lactam bridge — a cyclic bond formed between amino acid side chains — which constrains the molecule into a ring shape, a structural feature common among melanocortin peptides.
The compound has the molecular formula C50H68N14O10, a molecular weight of 1,025.2 g/mol, and a CAS number of 189691-06-3. It is supplied as a white to off-white lyophilized powder that dissolves readily in water. Structurally, PT-141 differs from its parent compound Melanotan II in that it lacks the linear N-terminal extension, making it a smaller, cyclized fragment. It is classified within the melanocortin receptor ligand family (MC1R through MC5R).
This product is strictly for research purposes only. Not approved for human or animal use.
PubChem Reference: View compound profile on NIH PubChem
Formula: C50H68N14O10
Weight: 1025.2 g/mol
CAS: 189691-06-3
Also Known As: Bremelanotide
Form: White to off-white lyophilized powder
Solubility: Readily dissolves in water
Storage: Keep refrigerated 36‑46 °F (2‑8 °C)
Reconstitution: Mix with bacteriostatic water
| Weight | 10mg |
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Carter David –
Third time ordering PT-141 from here. Excellent lyophilized powder, no clumping, and reconstitutes perfectly. Customer service responded quickly to my shipping question too
Linda skyrock –
Fast turnaround and secure packaging. PT-141 works as expected in our in vivo models. No degradation or potency loss compared to other suppliers. Will be a repeat customer for sure
Whitmore –
I’ve tested multiple batches now great solubility and stability. PeptidesVital offers fair pricing and genuine products. The free shipping over $200 is a huge bonus for labs ordering in bulk
Emily Rodriguez –
Finally found a reliable source for PT-141. The international shipping was seamless, and the product matches the COA they provide. Very happy with the consistency
Sarah Jenkins –
PeptidesVital never disappoints. The PT-141 purity is top-notch, and delivery to the US was surprisingly quick. My research data has been very promising. Highly recommend
Michael Thompson –
Consistent quality and fast shipping. PT-141 arrived well-packaged and exactly as described. Been using it in my research protocols with great results. Will order again.