Melanotan II 10mg (10 vials/kit): Synthetic Melanocortin Receptor Agonist for Research

Melanotan II (MT-2 or MT-II) is a synthetic, cyclic lactam heptapeptide analog of the naturally occurring peptide hormone alpha-melanocyte-stimulating hormone ($\alpha\text{-MSH}$). Featuring the chemical structure $\text{Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH}_2$, Melanotan II acts as a potent, non-selective agonist across multiple central and peripheral melanocortin receptor subtypes, including MC1R, MC3R, MC4R, and MC5R. Sourcing Melanotan II 10mg (10 vials/kit) provides dermatological laboratories, neuroendocrine researchers, and preclinical research facilities with a standardized, high-purity analytical reagent engineered to investigate melanogenesis pathways, central nervous system arousal mechanisms, and metabolic homeostasis.

In physiological and cellular research, Melanotan II is widely studied for its broad receptor activation profile. Activation of cutaneous melanocortin-1 receptors ($\text{MC1R}$) in epidermal melanocytes drives tyrosinase enzymatic activity and eumelanin synthesis, serving as a primary bio-assay model for UV-independent skin pigmentation and photoprotective cellular dynamics. Simultaneously, central cross-reactivity at hypothalamic $\text{MC3R}$ and $\text{MC4R}$ sites triggers neuroendocrine signaling cascades that regulate energy expenditure, appetite suppression, and central behavioral arousal.

Maintaining precise stoichiometry and structural stability is critical for quantitative receptor-binding assays and physiological response mapping. The Melanotan II 10mg (10 vials/kit) configuration delivers a combined total yield of 100mg active peptide material (10mg per vial) packaged across ten individual USP Type I borosilicate glass vials. Freeze-dried under sterile vacuum conditions, each vial contains a uniform, highly stable lyophilized powder cake. This multi-vial system allows research personnel to reconstitute only the working volume required for active experimental trials, preserving remaining kit stock in deep freeze stasis to prevent thermal degradation caused by repeated freeze-thaw cycles.

Receptor Agonism, Melanogenic Signaling, and Technical Profile

The primary scientific utility of Melanotan II 10mg (10 vials/kit) stems from its broad melanocortin receptor binding spectrum and enhanced metabolic stability:

• Broad Melanocortin Agonism (MC1R–MC5R): Binds non-selectively to melanocortin receptors, providing a robust experimental model for studying both peripheral pigmentation ($\text{MC1R}$) and central neuroendocrine pathways ($\text{MC3R/MC4R}$).

• Melanogenesis & Eumelanin Stimulation: Triggers intracellular cAMP accumulation in melanocytes, upregulating tyrosinase transcription and converting pheomelanin to photoprotective eumelanin.

• Central Appetite & Metabolic Modulation: Activates hypothalamic MC4R signaling pathways to study satiety circuits, energy homeostasis, and central metabolic regulation in preclinical animal models.

• Cyclic Lactam Bridge Stability: Internal side-chain cyclization ($\text{Asp-Lys}$) provides high resistance against enzymatic breakdown by systemic endopeptidases, significantly extending biological half-life compared to linear $\alpha\text{-MSH}$.

• Ultra-High Chemical Purity ($\ge$99.0%): Manufactured via automated Solid-Phase Peptide Synthesis ($\text{SPPS}$) and purified using preparative High-Performance Liquid Chromatography ($\text{HPLC}$) to ensure complete removal of deletion sequences and residual organic solvents.

Reconstitution Guidelines, Laboratory Storage Standards, and Quality Protocols

Achieving reproducible, publication-grade results when working with Melanotan II 10mg (10 vials/kit) requires strict adherence to standardized laboratory preparation and climate-controlled storage protocols.

Perform all reconstitution procedures inside a certified Class II Biosafety Cabinet:

1. Temperature Equilibration: Allow the frozen Melanotan II vial to adjust to ambient room temperature prior to solvent introduction to eliminate moisture condensation inside the glass container.

2. Septum Sanitization: Remove the protective plastic flip-cap and thoroughly wipe the synthetic rubber stopper with a fresh 70% isopropyl alcohol swab. Allow the surface to dry completely.

3. Slow Diluent Addition: Using a sterile syringe equipped with a fine-gauge needle, draw the required volume of Bacteriostatic Water (0.9% benzyl alcohol), Sterile Normal Saline (0.9% NaCl), or Sterile Water for Injection. Direct the liquid stream against the inner glass wall so it trickles slowly over the lyophilized cake.

4. Gentle Hydration: Allow the diluent to fully hydrate the powder cake for 2 minutes. Gently roll the vial between your palms or swirl in smooth circular motions until clear. Never vortex or shake vigorously, as high-shear agitation can shear peptide bonds and induce protein foaming.

5. Micro-Aliquot Strategy: For multi-week testing protocols, divide reconstituted liquid into sterile, single-use microcentrifuge tubes under aseptic conditions to prevent atmospheric oxidation and eliminate repeated freeze-thaw cycles.

Batch Quality Documentation & Traceability: Every production lot of Melanotan II 10mg (10 vials/kit) undergoes third-party analytical testing. High-Performance Liquid Chromatography (HPLC) chromatograms confirm component purity exceeding 99.0%, while Electrospray Ionization Mass Spectrometry (ESI-MS) confirms precise theoretical molecular mass. Each shipment includes a batch-specific Certificate of Analysis (COA) documenting chemical purity, residual solvent analysis, heavy metal screens, and bacterial endotoxin levels (<0.05 EU/mg) to satisfy institutional compliance requirements.

Strict Regulatory & Research Compliance Statement: Melanotan II 10mg (10 vials/kit) is produced, packaged, and distributed exclusively for in vitro laboratory research, academic experimentation, chemical synthesis, and preclinical research. Melanotan II 10mg (10 vials/kit) is strictly not intended, formulated, or approved for human or animal consumption, therapeutic medical treatment, clinical diagnostic work, or cosmetic applications. All handling must be conducted by certified research personnel operating within equipped laboratory facilities in compliance with OSHA workplace safety regulations and institutional biosafety protocols.