Single compound
Melanotan II
A synthetic ring-shaped (cyclic) peptide of seven amino acids, based on alpha-melanocyte-stimulating hormone and closed by a lactam bridge.
Chemistry
A synthetic ring-shaped (cyclic) peptide of seven amino acids, based on alpha-melanocyte-stimulating hormone and closed by a lactam bridge.
- Sequence
- Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2
- CAS number
- 121062-08-6
- Formula
- C50H69N15O9
- Molecular weight
- 1,024.2 g/mol
Storage and handling
Freeze-dried (lyophilized) powder. Keep the vial sealed in a freezer at -20 °C for long-term storage; a fridge at 2 to 8 °C is fine for short periods. Keep it out of light and away from moisture. Shelf life is 24 months from the lot release date when stored this way.
How this compound's lots are tested
Lots with a lab report are tested by an independent, named lab; a batch without one is clearly marked before purchase. Not every scope runs on every lot; the ledger entry for a given lot lists exactly which ones were run for it.
| Scope | On this compound's lots | What it establishes | What it does not establish |
|---|---|---|---|
| Identity | run | The report records the laboratory's identity assessment. Check the original document for the method and reference standard used. | An identity result alone does not establish quantity, purity, endotoxin levels, or sterility. |
| Purity | run | The percentage is reported using the laboratory's stated method. Different methods are not interchangeable; consult the original report. | Does not measure peptide mass per vial or establish identity, endotoxin levels, or sterility. |
| Endotoxin | run | A test called an LAL assay reports the level of bacterial toxin in the sample against a stated limit. | Does not establish that the vial is sterile, or confirm identity. |
| Sterility | run | The lab grows a sample to check for live microbial growth over the test period. | A result for one sample from the lot, not a guarantee for every vial. |
Batch reports
All lab resultsA lot identifies one batch. Read its laboratory report and review status below. An attached report does not mean a batch has been released for sale. A batch without a lab report is marked as such.
This batch's lab report was lost. Identity and purity are not verified.
- Lab report
- No lab report available
- Released
Nomenclature and aliases
- Also listed as
- Melanotan-II · MT-2 · MT-II
"Melanotan II" is commonly abbreviated "MT-2" or "MT-II" across vendor listings. It is structurally related to, but distinct from, PT-141/bremelanotide: the two differ by one atom at the C-terminus (an amide versus a free acid) and carry different CAS numbers, so the CAS number is the only reliable way to tell them apart from a name alone.