Melanotan 2 (MT-2) Research — Sourcing and Verification in Canada

What Melanotan 2 Is

Melanotan 2 (MT-2) is a cyclic analog of alpha-melanocyte-stimulating hormone (α-MSH), the hormone that signals melanocytes to produce melanin. It was developed at the University of Arizona in the 1980s alongside the linear analog Melanotan 1. Its sequence is Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2, a seven-residue lactam ring, and its molecular weight is about 1,024 g/mol. Unlike α-MSH, it is not selective: it acts at several melanocortin receptors (MC1R, MC3R, MC4R and MC5R), which is why it appears in pigmentation research and in research on central melanocortin signalling. It is sold by PRTCL strictly for laboratory research. It is not for human consumption and not intended to diagnose, treat, cure, or prevent any disease.

Sourcing and Verification

PRTCL's current 10 mg batch of Melanotan 2 was tested by Janoshik Analytical (task #148406) at 99.615% purity. The report is linked from the product page and can be checked on Janoshik's site with the task number and key printed on it. Vials are lyophilized and ship from within Canada via Xpresspost, with no customs crossing. Orders placed before 4 PM ET ship the same day.

Melanotan 2, Melanotan 1 and PT-141

Three related compounds are often confused. Melanotan 1 (afamelanotide) is a linear 13-amino-acid analog of α-MSH, about 1,647 g/mol, and is selective for MC1R. Melanotan 2 is the shorter cyclic form described above. PT-141 (bremelanotide) shares MT-2's ring but ends in a free acid instead of an amide, so its mass is about 1,025 g/mol, one unit away from MT-2. That small difference is why identity testing by mass spectrometry matters: a COA should report a mass that matches the specific compound on the label.

Regulatory Status in Canada

Melanotan 2 is not an authorized drug or health product in Canada. Health Canada's April 2026 public advisory on unauthorized injectable peptides names Melanotan I and II among products seized from sellers, and warns against buying peptides online for personal use. PRTCL sells Melanotan 2 only as a laboratory research material, labelled not for human consumption, and does not provide dosing or use guidance.

What to Check Before Ordering Melanotan 2 From Any Supplier

• Is the COA batch-specific, or a generic report reused across listings?
• Does the measured mass match Melanotan 2 (about 1,024 g/mol), not PT-141 or Melanotan 1?
• Is the testing lab named, and can the report be verified on the lab's own site?
• Is the product sold as a research material, without tanning claims or dosing instructions?
• Does the supplier ship domestically, or route through customs?

10 mg and 20 mg lyophilized vials, listed purity ≥99%. Current 10 mg batch: Janoshik #148406, 99.615%.