$99.99
Melanotan II (MTII) is a synthetic melanocortin peptide analog referenced in scientific and preclinical research involving receptor-mediated signaling pathways. With a well-characterized structure and affinity for multiple melanocortin receptor subtypes, Melanotan II is utilized as an investigational compound in controlled laboratory environments.
West Peptides provides high-purity Melanotan II in lyophilized form for use in analytical research and structured experimental applications.
$99.99
Melanotan II (MTII) is a synthetic melanocortin peptide analog referenced in scientific and preclinical research involving receptor-mediated signaling pathways. With a well-characterized structure and affinity for multiple melanocortin receptor subtypes, Melanotan II is utilized as an investigational compound in controlled laboratory environments.
West Peptides provides high-purity Melanotan II in lyophilized form for use in analytical research and structured experimental applications.
Melanotan II (MTII) is a synthetic peptide analog referenced in scientific and preclinical research involving receptor-mediated signaling pathways. Developed as a derivative of naturally occurring melanocortin peptides, MTII has been studied for its affinity toward multiple melanocortin receptor subtypes and its role in receptor-ligand interaction research.
West Peptides provides high-purity Melanotan II in lyophilized form for use in analytical research and structured experimental applications.
Melanotan II from West Peptides is supplied as a white lyophilized powder, formulated to support stability and precision in laboratory handling. The freeze-dried format allows for accurate reconstitution with sterile solvents and supports reproducibility in experimental workflows.
This synthetic peptide analog is frequently incorporated into research protocols examining melanocortin receptor activity, signaling pathways, and receptor-mediated biological processes in preclinical laboratory settings.
Melanotan II belongs to a class of synthetic melanocortin analog peptides developed to interact with melanocortin receptor systems. These receptor systems are widely studied in molecular biology, biochemistry, and pharmacological research due to their involvement in cellular signaling and physiological regulation.
In controlled laboratory environments, Melanotan II is used to investigate receptor activation, signal transduction mechanisms, and peptide-receptor interactions. Its receptor-binding profile has made it a commonly referenced compound in studies involving melanocortin signaling pathways and molecular communication networks.
Due to its defined sequence and well-documented receptor affinity characteristics, Melanotan II is often utilized as a reference compound in experimental research involving receptor pharmacology and peptide-mediated signaling.
Peptide Type: Synthetic melanocortin analog peptide
Form: White lyophilized powder
Purity: High-grade analytical standard
Stability: Stable under recommended laboratory conditions
Each batch undergoes verification for purity and composition to ensure consistency in research applications.
Melanotan II is commonly used in laboratory research for applications such as:
• Preparation of peptide solutions for analytical or mechanistic assays
• Investigation of melanocortin receptor engagement and signaling pathways
• Comparative analysis in receptor-ligand interaction studies
• Development of in vitro models involving receptor-mediated biological processes
• Evaluation of peptide analog activity in controlled experimental systems
These applications reflect controlled research environments where defined peptide analogs are used to explore molecular signaling systems and receptor pharmacology.
Synthesized to correspond to a specific peptide sequence documented in scientific literature.
Batch-tested to support reproducibility and reliability in laboratory studies.
Freeze-dried preparation helps maintain stability and enables controlled reconstitution.
Supplied in secure vials suitable for handling in laboratory conditions.
Melanotan II is a synthetic melanocortin analog peptide studied for its interaction with melanocortin receptor systems in scientific and preclinical research.
Researchers use Melanotan II in experimental models to investigate receptor-mediated signaling pathways, receptor activation mechanisms, and peptide-receptor interactions under controlled laboratory conditions.
Melanotan II is classified as a synthetic melanocortin analog peptide designed for receptor interaction and signaling studies.
Lyophilization preserves peptide integrity during storage and transport, allowing researchers to reconstitute it under controlled laboratory conditions for consistent experimental use.
Hruby VJ, Lu D, Sharma SD, Castrucci AL, Kesterson RA, Al-Obeidi FA, Hadley ME, Cone RD. Cyclic lactam alpha-melanotropin analogues of Ac-Nle4-cyclo[Asp5,D-Phe7,Lys10] alpha-MSH(4–10)-NH2 with bulky aromatic amino acids at position 7 show high antagonist potency and selectivity. J Med Chem. 1995;38(18):3454–3461.
Hadley ME, Dorr RT. Melanocortin peptide therapeutics: historical milestones, clinical studies and commercialization. Peptides. 2006 Apr;27(4):921–930. doi:10.1016/j.peptides.2005.01.022.
Wikberg JE, Muceniece R, Mandrika I, Prusis P, Lindblom J, Post C, Skottner A. New aspects on the melanocortins and their receptors. Pharmacol Res. 2000 May;42(5):393–420. doi:10.1006/phrs.2000.0706.
This product is intended strictly for laboratory research and scientific investigation purposes only. Melanotan II (MTII) is not approved by the United States Food and Drug Administration or any other regulatory authority for human or veterinary use. It is not intended for use as a drug, dietary supplement, cosmetic, or food product.

Our products are produced using a freeze-drying process (lyophilization), which helps maintain their integrity and stability during transit, typically for up to 3–4 months.
After the peptides are reconstituted (mixed with bacteriostatic water), they should be kept refrigerated to preserve their quality. Once in liquid form, they generally remain stable for up to 30 days when stored properly.
Lyophilization—also referred to as cryodesiccation—is a dehydration method where the material is first frozen and then exposed to low pressure. This allows moisture to transition directly from solid to vapor, leaving behind a dry, stable compound in the form of a light, crystalline powder. In this state, the product can be kept at room temperature until it is ready to be reconstituted.
Upon receiving your peptides, it is recommended to protect them from heat and light exposure. For short-term use (ranging from a few days to several weeks), refrigeration below 4°C (39°F) is suitable. Lyophilized products can also tolerate room temperature storage for a limited period if they will be used relatively soon.
For extended storage—spanning several months or longer—freezing is advised. Ideally, peptides should be kept at approximately -80°C (-112°F) to best maintain long-term stability
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