Overview of Melanotan II
Melanotan II is a synthetic heptapeptide analogue of the endogenous hormone alpha‑melanocyte‑stimulating hormone (α‑MSH). Its sequence, Ac‑Ser‑Tyr‑Ser‑Norleu‑Glu‑His‑D‑Phe‑Arg‑Trp‑Gly‑Lys‑Pro‑Val‑NH₂ (cyclized via a lactam bridge between Asp and Lys residues), confers high affinity for several melanocortin receptors, particularly MC1R, MC3R, MC4R and MC5R. In laboratory settings, this compound is widely utilized to investigate melanogenesis, pigmentation signalling cascades, and receptor pharmacology. Researchers employ it in cell‑based assays, tissue explants, and preclinical animal models to study UV‑independent melanin synthesis and related endocrine pathways. The peptide is supplied as a lyophilized powder, typically accompanied by a certificate of analysis confirming identity, purity, and peptide content. Because Melanotan II is strictly a research chemical, it is not formulated, approved, or intended for any diagnostic, therapeutic, or veterinary application; all handling must comply with institutional guidelines for investigational compounds.
Factors Influencing Wholesale Price per Gram
The wholesale price per gram of Melanotan II varies considerably, driven by several interconnected factors that research buyers must evaluate when sourcing material.
Niveau de pureté
Purity, typically assessed by reverse‑phase HPLC and confirmed by mass spectrometry, is the most direct cost driver. Peptide lots with a purity of ≥98% often command a premium, as achieving this level requires additional purification steps (e.g., multiple preparative HPLC runs), stricter quality control, and often results in lower overall yield from the synthesis. Material labelled ≥95% may be priced lower and is sometimes acceptable for preliminary binding studies, but researchers should align purity with the sensitivity of their experimental endpoints.
Quantity Ordered
Economies of scale are pronounced in peptide manufacturing. Synthesis of a single batch at the multi‑gram scale amortizes fixed costs – resin, reagents, solvent, labour, and equipment time – across a larger product mass. Consequently, per‑gram wholesale pricing drops markedly as order volume increases.
Supplier Reputation and Documentation
Established vendors that invest in ISO‑certified facilities, comprehensive analytical testing (including amino acid analysis, residual solvent analysis, and endotoxin quantification), and robust batch‑to‑batch consistency often set higher list prices. The added cost reflects the reliability of the documentation package and the lower risk of receiving degraded or misidentified material. Buyers who require third‑party verification or additional characterisation (e.g., circular dichroism, bioactivity assays) will see those services reflected in the quotation.
Market Demand and Supply Chain Dynamics
The global research peptide market is sensitive to raw material availability (protected amino acids, resins), shipping constraints for temperature‑sensitive lyophilizates, and evolving regulatory requirements. Sudden increases in demand from academic consortia or pharmaceutical screening programs can tighten supply, while export restrictions, customs clearance delays, or fluctuations in air‑freight costs can push per‑gram prices upward. Suppliers also adjust margins based on regional competition and the presence of intermediary distributors.
Typical Wholesale Price Ranges per Gram
Because the market for Melanotan II is unregulated (no official pharmacopoeia monograph exists), there is no fixed price list. Observed per‑gram wholesale figures generally span a broad interval. Small purchases of 1–5 grams, where handling, aliquoting, and documentation overhead are high relative to mass, may attract per‑gram costs in the upper part of the spectrum. Orders in the 10–25 gram range commonly see a step‑down in unit price, while volumes exceeding 50 grams can reduce the per‑gram rate by 30‑50% compared to smaller lots.
Actual quotations are influenced by the purity tier (e.g., 95‑98% ou ≥98%), whether the peptide is salt‑form (acetate or trifluoroacetate salt, with residual TFA content declared), and the inclusion of expedited cold‑chain shipping. Researchers are advised to request quotes from multiple reputable suppliers, specifying identical technical requirements (peptide sequence, purity, counterion, packaging) to enable meaningful comparison. The lyophilized powder is most commonly supplied in sterile, septum‑capped glass vials under argon or vacuum; alternative presentations (bulk jar, pre‑weighed aliquots) can affect unit cost as well.
Quantity Discounts and Bulk Orders
Virtually all wholesale suppliers structure pricing in tiers that reward larger purchases. A typical framework might include:
- 1–9 grams: baseline per‑gram rate, with no or minimal discount.
- 10–50 grams: moderate price reduction, often 10‑25% lower than the base tier.
- 51–250 grams: a more pronounced break; per‑gram cost may fall 30‑50% from the 1‑g rate.
- 500 grams and above: substantial volume discount, sometimes negotiated directly with the contract manufacturing organisation (CMO) for custom‑batch synthesis.
Minimum order quantities (MOQs) are frequently applied at the lower tiers. For example, a supplier may require a minimum of 5 grams to access the “wholesale” bracket, with smaller amounts priced at a premium. Institutions planning longitudinal studies often consolidate projected annual usage into a single bulk order (assuming validated long‑term storage at –20 °C with desiccation) to capture the lower per‑gram rate. It is critical to confirm that packaging preserves peptide integrity during multi‑year storage; vacuum‑sealed aliquots minimise freeze‑thaw cycles and moisture uptake.
Selecting a Reliable Supplier
Thorough due diligence protects research programs from consuming time and resources on material of unknown integrity. Key steps include:
- Analytical Documentation: Insist on a current certificate of analysis (CoA) that reports HPLC retention time and purity (≥95 % as a minimum), molecular mass by electrospray or MALDI‑TOF mass spectrometry, and net peptide content (often determined by amino acid analysis or nitrogen content). Some suppliers also provide residual TFA counter‑ion quantification and endotoxin levels.
- Third‑Party Testing: Independent verification by an accredited laboratory adds confidence. Some large research organisations maintain a list of pre‑qualified vendors whose batches have passed in‑house LC‑MS and functional testing.
- Shipping and Storage Capabilities: Confirm that the lyophilized peptide is shipped in airtight, moisture‑proof packaging, preferably with a temperature monitor if cold‑chain is used. The supplier’s standard operating procedures for inventory rotation and batch segregation help avoid supply of near‑expiry material.
- Reputation and Track Record: Review customer feedback on scientific procurement forums, examine the tenure of the supplier in the peptide sector, and check whether the company has been cited in peer‑reviewed publications.
- Registrations and Compliance: Suppliers holding ISO 9001 certification, or those that operate under GMP‑like conditions for research chemicals, signal a culture of quality. Ensure the vendor clearly labels products as “research use only” and does not make any therapeutic or diagnostic claims.
Regulatory Considerations for Research Use
Melanotan II exists in a niche regulatory space; it is not approved by the U.S. Food and Drug Administration, the European Medicines Agency, or any analogous body for human or veterinary clinical applications, and it remains exclusively a laboratory research tool. Researchers and procurement officers must navigate several compliance dimensions:
- Institutional Approval: Use in animals typically requires protocol review by an institutional animal care and use committee (IACUC) or equivalent ethics body. Handling, storage, and disposal of the peptide should be detailed in standard operating procedures aligned with institutional biosafety guidelines.
- Import and Customs: Classification as a research chemical varies by country. Some jurisdictions may require an import permit for peptides of this class, especially when arriving in gram‑quantities. Buyers should consult their institution’s legal or chemical‑safety officer to confirm local import requirements before placing orders.
- Labeling and Documentation: All received containers must be clearly labelled with “For laboratory research use only – not for human or veterinary use.” The supplier’s Safety Data Sheet (SDS) should accompany the shipment, outlining handling precautions, first‑aid measures, and disposal instructions. While Melanotan II is not generally considered hazardous, standard personal protective equipment (gloves, lab coat, eye protection) is recommended during reconstitution and weighing.
- Controlled Substance Status: In the United States, Melanotan II is not listed on the federal controlled substances schedules, but certain state‑level restrictions may apply. International research collaborations should verify the legal status in all participating countries to avoid inadvertent regulatory violations.
Conclusion
Wholesale pricing for Melanotan II per gram reflects a confluence of purity, volume, supplier capability, and market conditions. A methodical approach to sourcing – requesting detailed analytical documentation, comparing structured quotes, and evaluating the supplier’s long‑term reliability – enables research programmes to secure material that meets experimental requirements without overspending. Cost should never eclipse considerations of quality, regulatory compliance, and supply‑chain integrity. In every instance, Melanotan II must be employed strictly within the bounds of its intended laboratory research application, in accordance with all applicable laws and institutional policies.
À usage exclusivement scientifique : This article describes Melanotan II exclusively as a research chemical for laboratory investigation. It is not intended for human or veterinary diagnostic, therapeutic, or prophylactic use. Any mention of handling or procurement relates solely to legitimate scientific research settings. Researchers must verify local regulations and comply with institutional requirements before ordering or working with this compound.
Réservé à la recherche. Ne pas utiliser chez l'homme ni chez les animaux.
