Certificate of Analysis
Independent laboratory testing confirms purity and composition of this research peptide.
Endo Passed
Overview
Melanotan 2 (MT-2) is a synthetic cyclic heptapeptide — a ring-shaped chain of seven amino acids — designed as an analog of alpha-melanocyte-stimulating hormone (alpha-MSH). Its molecular formula is C50H69N15O9, and it has a molecular weight of 1024.20 g/mol. The CAS registry number is 121062-08-6. The key structural feature that distinguishes MT-2 from its linear predecessor Melanotan 1 is a lactam bridge, an internal bond that connects two amino acids within the chain and forces the peptide into a cyclic (ring) shape. This cyclic structure makes the molecule more compact and more resistant to breakdown by enzymes.
Melanotan 2 was first synthesized in the 1990s, building on the earlier work that produced Melanotan 1. While MT-1 is selective for the MC1R receptor, MT-2’s cyclic structure gives it structural compatibility with multiple melanocortin receptor subtypes, including MC1R, MC3R, MC4R, and MC5R. This broad receptor-family classification is a direct consequence of its three-dimensional shape. The compound is classified as a non-selective melanocortin receptor agonist. It is supplied as a white to off-white lyophilized powder that is soluble in both water and dilute acetic acid.
This product is strictly for research purposes only. Not approved for human or animal use.
PubChem Reference: View compound profile on NIH PubChem
Key Characteristics
MOLECULAR PROFILE
Formula: C50H69N15O9
Weight: 1024.20 g/mol
CAS: 121062-08-6
Structure: Cyclic heptapeptide with lactam bridge
PHYSICAL PROPERTIES
Form: White to off-white lyophilized powder
Solubility: Soluble in water and acetic acid
Selectivity: Non-selective MC1R/3R/4R/5R agonist
Storage: Keep refrigerated 36‑46 °F (2‑8 °C)
