Melanotan-II is one of the most-bought research peptides in Australia for tanning research. Because it is cheap to synthesise, both fake product and severely under-purity batches are common.
Melanocortin receptor agonist
Also known as: MT-II / MT2
Why test Melanotan-II?
Melanotan-II is dose-sensitive - too much causes severe side effects (nausea, hyperpigmentation issues). Under-fill means a buyer increases dose chasing an effect, then receives a corrected batch and over-doses. HPLC quantitative content is the only way to dose safely.
Common issues we find
Under-purity (<92% HPLC) is extremely common
Under-fill - labelled 10 mg, contains 6-8 mg
Substitution with PT-141 or other melanocortins
Frequently asked questions
How is Melanotan-II tested?
LC-MS for identity (confirms mass), HPLC for purity, and quantitative HPLC for actual mg per vial against a reference standard. A$549 per vial at LabDoc.
What purity should Melanotan-II be?
Reference-grade MT-II is ≥97% by HPLC. We frequently see Australian grey-market product land at 85-93% - significant impurities can drive side-effects.
Why does Melanotan-II purity vary so much?
MT-II is a cyclic peptide and the cyclisation step is where most failures occur. Linear precursors that didn't cyclise show up as impurity peaks on HPLC and reduce effective dose.
Is Melanotan-II legal in Australia?
Legal status varies by substance and circumstances. A 'research use only' label does not by itself make possession, importation, or supply lawful. Check current TGA and border guidance or obtain legal advice for your situation.
Can I test multiple MT-II vials at once?
Yes. Each vial is a separate line at A$549, with no volume discount - the price is the same whether you send one or ten. Many buyers test multiple batches from one vendor to confirm consistency before bulk ordering.