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Orders placed by 2 pm (CET) on a business day ship the same day. Free shipping from €75 Purity ≥ 99% (HPLC)
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Melanotan II cyclic heptapeptide, lyophilised

Melanotan II, a cyclic analogue of alpha-MSH, supplied as a 10 mg vial of research reagent. Every batch comes with confirmed HPLC purity and MS mass data.

€27.99 Price includes VAT

Lowest price in the last 30 days: €27.99

Research Use Only: for laboratory and scientific research only
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Free 10 ml bacteriostatic water with orders from €50 that include a vial peptide.
Orders placed by 2 pm (CET) on a business day ship the same day.

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  • Purity ≥ 99% (HPLC)
  • Free shipping from €75
  • Storage: −20 °C

Melanotan II specifications

FormLyophilised powder in a vial
Also known asMelanotanII, Melanotan-II
Purity≥ 99% (HPLC)
CAS number121062-08-6
Molecular formulaC50H69N15O9
Molar mass1,024.2 g/mol
StorageLyophilised: −20 °C, protected from light. After reconstitution: 2 to 8 °C.

Melanotan II: research overview

What Is Melanotan II

Melanotan II is a synthetic, cyclic analogue of alpha-MSH, the naturally occurring melanocyte-stimulating hormone. Alpha-MSH is derived from proopiomelanocortin (POMC) and takes part in the regulation of skin pigmentation and many processes controlled by melanocortin receptors.

The modifications made relative to the natural molecule make Melanotan II a frequently used tool in melanocortin receptor research. Its structure is well described in the literature, and every batch sold by MOLEVIA is supplied as a reagent for laboratory research.

Mechanism Described in Research

Melanotan II is a non-selective agonist of melanocortin receptors. It binds several subtypes, including MC1R, MC3R, MC4R and MC5R. The most frequently described pathway runs through MC1R on melanocytes.

Once the ligand binds, a G protein is activated and intracellular cAMP rises. In cell-based studies this increases the activity of enzymes involved in melanin synthesis, which makes Melanotan II a convenient reference point for melanogenesis research.

Research Areas

  • Melanogenesis and melanocyte biology in cell models
  • Skin pigmentation and melanocyte responses in animal model studies
  • Pharmacology of melanocortin receptors MC1R, MC3R, MC4R and MC5R
  • cAMP signalling in melanocytes and other cell types
  • Structural comparisons with natural alpha-MSH and other melanocortin analogues

The literature also describes clinical studies of Melanotan II focused on skin pigmentation. This makes the compound a well-documented reference point for preclinical models.

Reagent Specifications

Parameter Value
Name Melanotan II
CAS number 121062-08-6
Molecular formula C50H69N15O9
Molecular weight 1024.2 g/mol
Form lyophilized powder
Purity ≥ 99% (HPLC)
Available sizes 10 mg

Working in the Laboratory

Storing the Lyophilized Powder

  • Temperature: -20 °C, in a tightly sealed vial.
  • Protection: keep away from light and moisture.
  • Before opening: let the vial reach room temperature to limit condensation.

Reconstitution and Storing the Solution

  • Solvent: bacteriostatic water is the standard solvent in laboratory work. Diluted acetic acid is used when the literature points to better solubility in an acidic environment.
  • After dissolving: store the solution at 2-8 °C.
  • Freezing: avoid repeated freezing and thawing, and divide the solution into smaller aliquots.

Quality of Every Batch

Each batch is tested by HPLC, which confirms purity of ≥ 99%. Mass spectrometry (MS) confirms the molecular weight of 1024.2 g/mol.

Ordering and Shipping

Service Condition
Same-day dispatch Orders placed by 14:00 on business days
InPost parcel locker in Poland Next business day
DPD across 29 European countries 2-4 business days
Free shipping From 75 EUR, 65 GBP, 80 USD
Quantity discount 2 pcs 5%, 3 pcs 10%, 5 pcs 15%

Pay online by card, Apple Pay, Google Pay or BLIK (PLN only).

  • Melanotan I, a second melanocortin analogue in our range
  • PT-141, from the same melanocortin receptor family
  • GHK-Cu, a peptide from the skin category

Browse the full skin peptides category, review our quality standards, or convert concentrations in the concentration calculator.

Melanotan II: frequently asked questions

How should I store Melanotan II in lyophilized form?

Keep the lyophilized powder at -20 °C in a tightly sealed vial, protected from light and moisture. Before opening the vial, let it reach room temperature to limit condensation inside.

How do I reconstitute Melanotan II and store the solution?

Reconstitution is performed in the laboratory, with bacteriostatic water as the solvent. Store the solution at 2-8 °C and avoid repeated freezing and thawing.

Is Melanotan II available in other sizes?

Melanotan II is offered in one size, 10 mg. Buying 2 vials gives 5% off, 3 vials 10% off and 5 vials 15% off. The discount is applied automatically in the cart.

How does shipping work for Melanotan II?

Orders placed by 14:00 on a business day ship the same day. In Poland, parcels reach an InPost parcel locker the next business day, and DPD delivers to 29 European countries in 2-4 business days. Shipping is free from 75 EUR, 65 GBP, 80 USD.

What is the molecular structure of Melanotan II?

Melanotan II is a cyclic analogue of alpha-MSH with the molecular formula C50H69N15O9, a molecular weight of 1024.2 g/mol and CAS number 121062-08-6. It was built by modifying the natural alpha-MSH sequence, which made it a common tool in melanocortin receptor research.

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