Verified — all release criteria met
releasedCurrent lot
Certificate of analysis
Melanotan II
Lot CP-MELANORR-2606A · 10 mg
99.75 %
HPLC purity
Spec ≥ 99.0 %
91.6 %
Net peptide content
By amino acid analysis
< 0.68
Endotoxin (EU/mg)
Spec < 5.0 EU/mg
Provenance
- Testing laboratory
- Janoshik Analytical
- Accreditation
- ISO/IEC 17025:2017
- Country of synthesis
- United States
- Manufactured
- Jun 9, 2026
- Release tested
- Jun 18, 2026 (3 months ago)
- Retest date
- Jun 8, 2028
- CAS number
- 121062-08-6
- Molecular formula
- C50H69N15O9
- Theoretical mass
- 1024.18 Da
- Observed mass (LC-MS)
- 1023.90 Da (Δ 0.28 Da)
Assay results
Every line the release panel ran for this lot, with the method, the acceptance criterion and the measured value — not a pass mark alone.
| Method | Parameter | Specification | Result | |
|---|---|---|---|---|
| RP-HPLC (UV 214 nm) | Purity (area %) | ≥ 99.0 % | 99.75 % | Pass |
| LC-MS (ESI+) | Identity — observed mass | 1024.18 ± 1.0 Da | 1023.90 Da | Pass |
| Amino acid analysis | Net peptide content | ≥ 80.0 % | 91.6 % | Pass |
| Karl Fischer | Water content | ≤ 8.0 % | 2.45 % | Pass |
| Ion chromatography | Residual TFA | ≤ 1.0 % | 0.27 % | Pass |
| LAL kinetic chromogenic | Bacterial endotoxin | < 5.0 EU/mg | < 0.68 EU/mg | Pass |
| USP <71> membrane filtration | Sterility | No growth | No growth | Pass |
| Visual / USP <790> | Appearance | White to off-white cake, free of visible particulates | Conforms | Pass |
| RP-HPLC (orthogonal gradient) | Linear (uncyclised) content | ≤ 0.5 % | 0.04 % | Pass |
Sequence
Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2
Handling for this lot
- Appearance
- White lyophilised powder
- Storage
- -20 °C lyophilised, protected from light
- Reconstitution
- Check the linear-content line on the certificate. Uncyclised material is the single most common defect in this compound across the market.
Other lots of Melanotan II
Compare batch to batch. Consistency across lots is a stronger signal than any single certificate.
Research use only. This certificate describes material supplied strictly for laboratory research. It is not a drug, food, cosmetic or medical device, has not been evaluated by the FDA, and is not intended for human or veterinary administration of any kind.