Metabolic Research

Melanotan II (Research Grade)

Melanotan II is a cyclic lactam analog of alpha-MSH that binds multiple melanocortin receptors, including MC1R. It is the reference compound in melanogenesis and melanocortin receptor selectivity research.

US cGMP Facility 99%+ HPLC Purity Public COAs Same-Day Dispatch

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Melanotan II specifications

Reference data researchers look up before ordering melanotan ii. Every lot ships with documentation matching the batch number printed on the vial.

  • Class: cyclic alpha-MSH analog
  • Receptors: MC1R, MC3R, MC4R
  • Also known as: MT-2, MT-II
  • Storage: -20°C lyophilized

Melanotan II purity testing and certificate of analysis

Each melanotan ii lot is released only after an independent purity panel. HPLC quantifies purity, LC-MS confirms molecular identity, and the lot-matched certificate is published so the number on your vial matches the report you download.

  • ≥99% HPLC purity specification
  • LC-MS mass confirmation on every batch
  • Endotoxin and sterility panel documentation
  • Lot-matched melanotan ii COA published on the certifications page

Melanotan II reconstitution and BAC water ratios

Melanotan II ships lyophilized. Reconstitute with bacteriostatic water containing 0.9% benzyl alcohol. The ratios below assume a standard U-100 insulin syringe.

  • 10mg vial + 2mL BAC water = 5mg per mL (10 units = 500mcg)
  • 10mg vial + 5mL BAC water = 2mg per mL (25 units = 500mcg)
  • Protect from light throughout handling
  • Refrigerate after reconstitution

Where to buy melanotan ii

PX1 Research synthesizes and fills melanotan ii in a US cGMP-compliant facility rather than reselling imported material, so purity documentation traces back to the production lot. Multi-vial pricing steps down at 3, 5 and 10 vials, and subscription intervals are available on the product page.

Reconstitution calculator

Convert vial strength and bacteriostatic water volume into exact insulin-syringe unit marks.

Peptide reconstitution calculator

Vial strength (mg)
Bacteriostatic water (mL)
Target dose

Concentration

5 mg/mL

Draw volume

0.05 mL

Insulin syringe

5 units (IU)

U-100 insulin syringe (100 units = 1 mL)

5 IU
020406080100

10 mg + 2 mL = 5 mg/mL. A 250 mcg dose = 5 units on a U-100 syringe (40 doses per vial).

For laboratory and research use only. Not for human or veterinary use.

Need solvent? Buy bacteriostatic water (10mL / 30mL)

Frequently asked questions

Melanotan 1 vs melanotan 2 — what is different?

Melanotan I is linear and largely MC1R-selective; melanotan II is cyclic and binds several melanocortin receptors, which is why its research profile is broader.

Is PT-141 related to melanotan II?

Yes — PT-141 is a metabolite of melanotan II with central melanocortin activity and no pigmentation effect.

Is a certificate of analysis provided with melanotan ii?

Yes. Every melanotan ii lot has a published, lot-matched COA showing HPLC purity and LC-MS identity confirmation.

How should melanotan ii be stored?

Store the lyophilized vial at -20°C protected from light. Once reconstituted with bacteriostatic water, keep it refrigerated at 2–8°C.

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