Description
Melanotan II: Research Compound Overview
Melanotan II is a research compound supplied by Stimulus Labs for laboratory and in-vitro use. It is a synthetic cyclic heptapeptide analog of alpha-melanocyte-stimulating hormone (α-MSH), cyclized through a lactam bridge between aspartic acid and lysine side chains. It is a non-selective agonist at the melanocortin receptors MC1R, MC3R, MC4R, and MC5R, studied in pigmentation, appetite, energy-homeostasis, and sexual-response research. Molecular formula C50H69N15O9; molecular weight approximately 1,024.2 g/mol. Supplied as a lyophilized powder.
It is offered at 99%+ purity, with every batch independently verified by third-party HPLC and mass-spectrometry testing before listing, so researchers can trust the identity and purity of the material they receive. Stimulus Labs works only with laboratories that document their methodology, and re-tests new supplier lots before they reach the catalog, rather than relying on a single certificate provided at the point of manufacture.
Purity, Testing & Handling
Every batch ships with a batch-specific Certificate of Analysis (COA), confirming identity and purity ahead of listing, and available to view before you buy. Researchers should store the lyophilized powder at the temperature indicated on the vial label, reconstitute only with an appropriate diluent such as bacteriostatic water, and handle it exclusively within a controlled laboratory setting using standard aseptic technique. Once reconstituted, solutions are generally less stable than the lyophilized form, so researchers typically prepare only the volume needed for near-term use and record storage conditions as part of their protocol. Browse the full research peptide catalog at Stimulus Labs for related compounds and blends studied alongside Melanotan II.
Chemical Identity
Melanotan II is associated with CAS number 121062-08-6. Researchers can cross-reference this number against the CAS Common Chemistry registry to independently confirm identity rather than relying on any single supplier’s labeling. Keeping a record of lot numbers, COA results, and CAS verification alongside any published research is good practice for maintaining a reproducible research record.
For Research Use Only. Not for human or veterinary use. Not a drug, food, or cosmetic. Melanotan II is sold exclusively to qualified researchers and institutions for laboratory research purposes, and Stimulus Labs makes no claims about outcomes outside of a controlled research setting.
