Melanotan 1 Reconstitution Chart (Every Vial Size)

Introduction to Melanotan 1 Laboratory Properties

Melanotan 1 (MT-1), structural peptide analog of alpha-melanocyte-stimulating hormone (α-MSH), is a non-selective melanocortin receptor agonist widely utilized in preclinical research settings. As a high-affinity melanocortin analog, the primary mechanism of action involves binding to melanocortin-1 receptors (MC1R), among other receptor subtypes in vitro. Grounding data from preclinical models indicate that MT-1 is predominantly researched for melanocortin activity related to skin pigmentation responses, melanogenesis, and cellular signaling cascades.

To ensure reproducible experimental outcomes, investigators must achieve precise molar concentration when preparing working stock solutions from lyophilized cakes. Researchers obtaining high-purity reference material typically work with a standardized MT-1 10mg vial. Accurate reconstitution requires a clear understanding of mass-to-volume ratios, reagent compatibility, and peptide solubility characteristics. Accessing specialized reference compounds through our broader catalog of research peptides allows laboratories to maintain consistent analytical protocols across diverse assays.

Master Melanotan 1 Reconstitution Reference Chart

The following master reconstitution table outlines the resulting peptide concentration (mg/mL) and mass yield per 0.1 mL (equivalent to 10 graduations on a standard 100-unit volumetric research syringe) across common vial masses (2 mg, 5 mg, and 10 mg) and reconstituting diluent volumes (1.0 mL to 5.0 mL).

| Vial Mass (mg) | Diluent Volume Added (mL) | Final Concentration (mg/mL) | Mass per 0.1 mL Volumetric Unit (mg) | Content per 0.1 mL (mcg) | |---|---|---|---|---| | 2.0 mg | 1.0 mL | 2.0 mg/mL | 0.20 mg | 200 mcg | | 2.0 mg | 2.0 mL | 1.0 mg/mL | 0.10 mg | 100 mcg | | 2.0 mg | 3.0 mL | 0.67 mg/mL | 0.067 mg | 67 mcg | | 5.0 mg | 1.0 mL | 5.0 mg/mL | 0.50 mg | 500 mcg | | 5.0 mg | 2.0 mL | 2.5 mg/mL | 0.25 mg | 250 mcg | | 5.0 mg | 2.5 mL | 2.0 mg/mL | 0.20 mg | 200 mcg | | 5.0 mg | 5.0 mL | 1.0 mg/mL | 0.10 mg | 100 mcg | | 10.0 mg | 1.0 mL | 10.0 mg/mL | 1.00 mg | 1000 mcg | | 10.0 mg | 2.0 mL | 5.0 mg/mL | 0.50 mg | 500 mcg | | 10.0 mg | 2.5 mL | 4.0 mg/mL | 0.40 mg | 400 mcg | | 10.0 mg | 4.0 mL | 2.5 mg/mL | 0.25 mg | 250 mcg | | 10.0 mg | 5.0 mL | 2.0 mg/mL | 0.20 mg | 200 mcg |

Note: Volumetric accuracy is dependent upon calibrated laboratory pipettes or precision analytical syringes. Laboratories requiring alternative volume calculations can quickly cross-reference non-standard concentrations using our automated peptide reconstitution calculator.

Mathematical Formulas and Worked Reconstitution Calculations

To calculate the concentration of reconstituted Melanotan 1 for custom experimental volumes, apply the standard mass-concentration formula: C = M / V, where C represents the final concentration in milligrams per milliliter (mg/mL), M represents the total peptide mass in milligrams (mg) present in the vial, and V represents the volume of diluent added in milliliters (mL).

To determine the specific mass delivered in a target sample aliquot (V_aliquot), use the equation: Mass_aliquot = C × V_aliquot. Below are two fully worked technical examples commonly applied in laboratory settings.

Worked Technical Examples for Laboratory Personnel

Example 1: Preparing a 4.0 mg/mL Working Stock from a 10 mg Vial. - Given: Vial Mass (M) = 10.0 mg; Desired Concentration (C) = 4.0 mg/mL. - Calculation for Diluent Volume (V): V = M / C = 10.0 mg / 4.0 mg/mL = 2.5 mL. - Protocol: Introduce 2.5 mL of Bacteriostatic Water or Sterile Normal Saline into the 10 mg vial. Upon complete dissolution, each 0.1 mL (10 IU on a U-100 volumetric syringe) delivers exactly 0.40 mg (400 mcg) of Melanotan 1.

Example 2: Preparing Low-Concentration Aliquots from a 5 mg Vial. - Given: Vial Mass (M) = 5.0 mg; Diluent Volume (V) = 5.0 mL. - Calculation for Concentration (C): C = 5.0 mg / 5.0 mL = 1.0 mg/mL. - Protocol: Add 5.0 mL of bacteriostatic diluent to the 5 mg lyophilized powder. A 0.05 mL sample aliquot (5 IU on a U-100 scale) yields 0.05 mg (50 mcg) of active compound. This lower concentration reduces volumetric sampling error when handling micro-dose cellular assay applications.

Diluent Selection: Bacteriostatic Water vs. Sterile Saline

Selecting the appropriate solvent for Melanotan 1 reconstitution depends heavily on the intended duration of the research study and storage conditions. The two most common diluents utilized in laboratory protocols are Bacteriostatic Water (0.9% benzyl alcohol preserved) and Sterile 0.9% Sodium Chloride (Normal Saline).

Bacteriostatic Water is preferred for multi-use laboratory vials intended to be stored at 2–8°C over extended testing periods (up to 28 days). The 0.9% benzyl alcohol acts as a bacteriostatic agent, preventing microbial proliferation in multi-entry vials. Conversely, for immediate single-assay applications or primary cell cultures sensitive to benzyl alcohol toxicity, unpreserved Sterile Water for Injection (SWFI) or phosphate-buffered saline (PBS) should be utilized. When using unpreserved solvents, solutions must be used immediately or divided into single-use sub-aliquots and stored at -20°C.

Step-by-Step Aseptic Reconstitution Protocol

To avoid sample contamination or mechanical degradation of the Melanotan 1 peptide chain during dissolution, laboratory personnel should adhere strictly to standard operating procedure:

1. Preparation: Remove the Melanotan 1 vial and diluent from refrigerated storage. Allow both to equilibrate to ambient laboratory temperature (20–22°C) for 15 minutes to minimize thermal shock during mixing. Sanitize the rubber stoppers using 70% isopropyl alcohol swabs. 2. Pressure Equalization: Draw the intended volume of diluent (e.g., 2.5 mL) into a sterile lab syringe. Prior to injecting diluent into the vacuum-sealed vial, vent excess pressure if necessary, though PX1 vials are packaged under partial inert vacuum. 3. Reagent Transfer: Angle the needle against the inner glass wall of the vial. Slowly depress the plunger to allow the diluent to stream gently down the glass surface rather than dripping directly onto the center of the lyophilized cake. 4. Dissolution: Gently roll and invert the vial between your palms until the powder is fully dissolved into a clear, colorless liquid. NEVER vortex or violently shake the vial, as physical shear stress can induce peptide aggregation or denaturation.

Solubility Dynamics and Handling Parameters

Lyophilized Melanotan 1 manufactured to high analytical standards demonstrates rapid solubility in aqueous media, typically dissolving within 30 to 60 seconds of gentle rotation. Standard reconstitution produces a transparent, particle-free solution. If particulates or cloudiness persist, check solution pH or ensure the diluent is at room temperature.

In vitro data indicate that melanocortin analogs are sensitive to extreme alkaline conditions or exposure to strong oxidizing agents. The optimal pH range for dissolved MT-1 stability is between 4.0 and 6.5. Maintaining this range prevents accelerated hydrolysis of the peptide backbone. To verify batch identity, purity, and exact net peptide content prior to reconstitution, researchers can review our official Certificate of Analysis (COA) documentation available for every lot.

Comparative Analysis: Melanotan 1 vs. Related Melanocortin Receptor Agonists

When designing comparative preclinical studies targeting melanocortin pathways, investigators frequently evaluate multiple structural analogs alongside Melanotan 1. Distinct amino acid modifications yield varying receptor binding affinities, half-lives, and biological responses across melanocortin receptor subtypes (MC1R through MC5R).

For instance, while Melanotan 1 retains a linear peptide sequence closely mimicking native α-MSH, Melanotan 2 is a cyclic lactam analog with increased central nervous system permeability and non-selective binding across MC3R, MC4R, and MC5R. Similarly, Bremelanotide PT-141 is a metabolite derivative evaluated primarily for central melanocortin receptor activation rather than peripheral MC1R melanogenesis. For broader comparative studies involving adrenocorticotropic signaling fragments, researchers also analyze ACTH peptide research compounds to assess pathway cross-talk.

Storage, Temperature Tolerance, and Stability Protocol

The molecular stability of Melanotan 1 varies depending on physical state, temperature, and exposure to light. Lyophilized powder stored at -20°C remains stable for up to 24 months. Upon reconstitution with preserved bacteriostatic water, working stock solutions retain verified potency for up to 28 days when refrigerated continuously at 2°C to 8°C.

Repeated freeze-thaw cycles must be avoided for reconstituted liquid solutions. Freezing liquid aliquots causes ice crystal formation that can mechanically cleave peptide bonds. If long-term storage of reconstituted MT-1 is necessary, divide the primary solution into single-use polypropylene micro-centrifuge tubes, flash-freeze at -80°C, and thaw only immediately prior to assay execution.

Quality Assurance, Purity Verification, and USA Manufacturing Standards

PX1 Research enforces stringent quality control measures across all peptide synthesis workflows. Every lot of Melanotan 1 is USA-manufactured in ISO 17025 accredited and cGMP-compliant facilities. Chemical identity and purity are independently verified using High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) to ensure a minimum purity profile of 99%.

Additionally, end-product testing includes chromogenic LAL assays to confirm endotoxin levels remain strictly under <0.01 EU/mg, minimizing background interference in cell culture and preclinical assay environments. Products are shipped directly from our primary fulfillment locations in California and Arizona, with same-day dispatch available Monday through Friday for fast, reliable delivery to academic and private laboratories. Explore options for institutional research supplies through our dedicated wholesale peptide portal or review our comprehensive peptide research library.