Melanotan II (MT2) is a synthetic peptide derived from the α‑melanocyte‑stimulating hormone (α‑MSH), which plays a key role in regulating skin pigmentation and other biological functions. The peptide sequence of MT2 is designed to mimic the effects of α‑MSH by stimulating melanocortin receptors, particularly MC1R, leading to increased melanin production in the skin. It is commonly studied in laboratory research for its lipolytic effects, melanogenesis, and potential applications in sunless tanning and skin pigmentation research.

MT2 is supplied in lyophilized (freeze‑dried) powder form, making it easy to store and reconstitute with a sterile solvent like sterile water or bacteriostatic water. The purity of the peptide is typically ≥ 98–99%, confirmed by analytical methods such as High‑Performance Liquid Chromatography (HPLC) or Mass Spectrometry (MS), ensuring consistency and reliability in research applications.

For storage, MT2 should be kept in a cool, dry place and ideally stored at ‑20°C or lower if unopened to maintain long‑term stability. Once reconstituted, the solution should be stored in the refrigerator at 2°C to 8°C and used within the time frame specified by the supplier. It is important to avoid repeated freeze/thaw cycles after reconstitution to preserve the peptide’s integrity.

A Certificate of Analysis (COA) is typically provided with each batch of Melanotan II, confirming the purity, identity, and molecular weight of the peptide. The COA will also include batch number for traceability, ensuring the peptide meets the specified quality standards.

Melanotan II is strictly for research purposes only and is not FDA-approved for human use, clinical, or therapeutic applications. It is used primarily in preclinical research and laboratory studies to explore the role of melanocortins in skin pigmentation, fat metabolism, and other related biological functions.