Melanotan II, MT-2 and afamelanotide frequently appear in the same online conversations. That does not make them the same molecule—or the same product.
For professional research buyers, naming accuracy matters because incorrect identity assumptions can affect literature searches, analytical specifications and procurement decisions.
What Is Melanotan II?
Melanotan II (MT-2, CAS 121062-08-6) is a synthetic cyclic melanocortin-related research peptide.
It has been investigated in research involving melanocortin-receptor signaling, pigmentation biology and other melanocortin-mediated pathways.
Common search terms include:
Melanotan 2 peptide, Melanotan II research peptide, MT-2 peptide, Melanotan 2 supplier, Melanotan II HPLC and Melanotan II COA.
But one search term requires particular care:
Afamelanotide.
Melanotan II and Afamelanotide Are Not the Same Molecule
Afamelanotide is associated with the regulated finished drug SCENESSE.
Melanotan II is a different melanocortin-related peptide.
Although both are connected to alpha-MSH and melanocortin research, they have different molecular identities and should not be treated as interchangeable names.
For B2B researchers, that distinction matters when reviewing:
- CAS numbers;
- molecular structure;
- analytical reference data;
- published literature;
- Certificates of Analysis;
- regulatory information.
A supplier should therefore identify material by its actual molecular identity—not simply by a related commercial or clinical peptide name.
An Approved Afamelanotide Drug Does Not Make MT-2 an Approved Drug
SCENESSE is a regulated afamelanotide finished pharmaceutical product for a specific approved indication.
That approval does not extend to Melanotan II.
Likewise, research-grade MT-2 should not be marketed as though it were SCENESSE, afamelanotide or an approved tanning medicine.
For professional procurement, these are separate questions:
What molecule is being supplied?
and
Can that exact batch be analytically verified?
Why HPLC Is Important—but Not Enough by Itself
A high Melanotan II HPLC purity result provides useful information about chromatographic purity.
But a percentage alone does not prove:
- molecular identity;
- correct peptide structure;
- relevant impurity profile;
- consistency between batches;
- whether the documentation matches the supplied lot.
This is why serious peptide sourcing should separate purity from identity.
What Should B2B Buyers Check?
Professional buyers evaluating a Melanotan 2 supplier may consider reviewing:
Batch-specific COA
The Certificate of Analysis should correspond to the actual production lot.
HPLC chromatogram
Useful for evaluating chromatographic purity and related impurities.
MS or LC-MS identity data
Where appropriate, mass analysis can provide additional evidence supporting molecular identity.
CAS and molecular specification
The documentation should consistently identify Melanotan II rather than incorrectly treating it as afamelanotide.
Lot traceability
The material, analytical records and batch number should remain traceable throughout the supply chain.
What Do Online Melanotan II Reviews Say?
Online sentiment is mixed.
Positive discussions commonly mention perceived pigmentation changes and, in some reports, changes in libido.
Negative reports frequently describe:
- nausea;
- flushing;
- darker freckles;
- darker existing moles;
- uneven pigmentation;
- unwanted skin-color changes.
These reports are anecdotal.
Product source, identity, purity, concurrent substances, UV exposure and individual health factors are often unknown.
Online reviews cannot establish the safety, efficacy or quality of a particular research-grade Melanotan II batch.
Melanotan II Research Peptide from Sunone
Sunone (Hong Kong) Biopharmaceutical International Technology Co., Limited supplies Melanotan II for qualified laboratory research and biotechnology manufacturing applications.
Current product specifications include:
Product: Melanotan 2 / Melanotan II
Abbreviation: MT-2 / MT-II
CAS: 121062-08-6
Molecular Formula: C50H69N15O9
Molecular Weight: 1024.18 g/mol
Grade: Research Grade
Purity Specification: ≥99% HPLC
Form: Lyophilized Powder
Storage: 2–8°C, protected from light
Documentation: COA, SDS and Specification Sheet available
Current B2B formats include 5 mg × 10 vials and 10 mg × 10 vials, subject to project requirements and availability.
Looking for a Melanotan 2 supplier with batch-specific analytical documentation?
View Sunone Melanotan 2 Specifications：
Contact Sunone with your required quantity, specification, analytical-documentation, packaging and OEM/ODM requirements for a current B2B quotation.
FAQ
Is Melanotan II the same as afamelanotide?
No. They are distinct melanocortin-related peptide entities and should not be treated as interchangeable molecular names.
Is Melanotan II the same as SCENESSE?
No. SCENESSE is a regulated finished drug containing afamelanotide. Melanotan II is a different peptide.
Is Melanotan II FDA approved?
Melanotan II is not an FDA-approved drug for tanning or other personal-use applications.
What is the CAS number of Melanotan II?
Melanotan II is identified as CAS 121062-08-6.
Does ≥99% HPLC prove Melanotan II identity?
Not by itself. Chromatographic purity and molecular identity are separate analytical questions.
What should a B2B buyer request from an MT-2 supplier?
Depending on the research application, buyers may consider requesting a batch-specific COA, HPLC chromatogram, appropriate MS/LC-MS identity data, impurity information, SDS and lot traceability.
This content is provided for scientific and educational purposes only. SUNONE research peptide is for qualified labrtorynt, diagnois, druc tor mmatct or veteimant, use.research only, Not for human consumption, clinical treame. Purchasers are responsible for complying with applicable laws and regulations in their jurisdiction.
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