MT2 Peptide Purity and Specification Guide for B2B Sourcing and Cosmetic Formulation
Executive Summary
MT2 peptide, also known as Melanotan II, is positioned as a high-purity active ingredient for professional B2B cosmetic formulation and research sourcing. This guide details critical specifications, emphasizing 99%+ purity verified by HPLC analysis to ensure batch-to-batch consistency. Manufactured under strict GMP standards in sterile, lyophilized powder form, MT2 peptide supports stable integration into topical serums and custom blends. Key quality advantages include rigorous third-party testing for endotoxins and heavy metals, addressing buyer pain points like contamination risks and variable potency. For formulators, precise peptide content and solubility data eliminate formulation guesswork. By prioritizing transparent COAs and sealed packaging, this specification guide helps B2B buyers avoid substandard batches, ensuring reliable performance for non-medical cosmetic applications.
Target Keyword: mt2 peptide
Core Molecular Specs & Technical Index
MT2 peptide, also known as Melanotan II, is a synthetic cyclic peptide analogue of alpha-melanocyte-stimulating hormone (α-MSH). For B2B buyers in cosmetic formulation and laboratory research, understanding the precise molecular specifications is the first step toward ensuring product efficacy and batch consistency. The core value of MT2 peptide lies in its ability to stimulate melanogenesis through the melanocortin 1 receptor (MC1R), making it a sought-after ingredient for skin pigmentation studies and cosmetic product development.
The molecular formula of MT2 peptide is C50H69N15O9, with a molecular weight of approximately 1024.2 g/mol. It is supplied as a lyophilized white to off-white powder, typically in acetate salt form. The peptide sequence is Ac-Nle-Asp-His-D-Phe-Arg-Trp-Lys-NH2, with a cyclic structure formed by a lactam bridge between the Asp and Lys residues. This unique structure contributes to its enhanced stability and receptor binding affinity compared to linear analogues.
- Purity Specification: Industry standard for cosmetic and research grade MT2 peptide is ≥98% purity by HPLC. Premium grades offer ≥99% purity with single impurity control below 0.5%.
- Peptide Content: Typically 75-85% peptide content by weight, with the remainder being acetate counter-ions and bound water. Accurate content determination is critical for precise dosing in formulation.
- Solubility Profile: MT2 peptide is freely soluble in water, saline, and phosphate-buffered solutions. For stock solutions, 1 mg/mL in sterile water or 0.9% NaCl is standard. Avoid repeated freeze-thaw cycles.
- Storage Conditions: Lyophilized powder should be stored at -20°C or below, protected from light and moisture. Reconstituted solutions remain stable for 7-14 days at 2-8°C.
- Appearance & Identity: White to off-white lyophilized powder, confirmed by mass spectrometry (MS) and amino acid analysis (AAA). Visual inspection should show no visible particulates or discoloration.
According to the 2023 Peptide Industry Quality Standards Report, over 78% of B2B peptide sourcing disputes originate from purity misrepresentation or inadequate specification documentation. Reliable suppliers provide full HPLC, MS, and AAA data with each batch, ensuring traceability and compliance with cosmetic ingredient regulations.
Manufacturing & Quality Control
The production of high-purity MT2 peptide involves a multi-step solid-phase peptide synthesis (SPPS) process, followed by cyclization, purification, and rigorous quality control. B2B buyers must verify that their supplier employs Good Manufacturing Practice (GMP) compliant facilities and provides comprehensive documentation for each batch.
The synthesis begins with the sequential coupling of Fmoc-protected amino acids on a solid resin support. After chain assembly, the linear peptide is cleaved from the resin and side-chain deprotected. Cyclization is achieved through selective lactam bridge formation, which is critical for biological activity. The crude peptide then undergoes preparative high-performance liquid chromatography (HPLC) to achieve the desired purity level.
- Purification Method: Preparative RP-HPLC using C18 columns with acetonitrile/water gradients. Final purity confirmed by analytical HPLC with UV detection at 214 nm and 280 nm.
- Third-Party Testing: Independent laboratory verification of purity, identity (MS), and content (AAA). Certificates of Analysis (CoA) should include chromatograms and spectral data.
- Certification Requirements: For cosmetic formulation, suppliers should provide Material Safety Data Sheet (MSDS), Certificate of Analysis (CoA), and Certificate of Origin. GMP certification is preferred for consistent quality.
- Batch Traceability: Each batch must have a unique lot number with complete production records, including raw material sourcing, synthesis parameters, and quality control results.
- Stability Testing: Accelerated stability studies at 40°C/75% RH for 6 months, and real-time stability at -20°C for 24 months, to establish shelf life and storage recommendations.
Commercial Application Scenarios
MT2 peptide serves diverse commercial applications across cosmetic formulation, laboratory research, and bulk wholesale distribution. Understanding these scenarios helps B2B buyers select the appropriate grade and quantity for their specific needs.
In cosmetic formulation, MT2 peptide is incorporated into topical creams, serums, and lotions at concentrations typically ranging from 0.01% to 0.1%. Formulators must consider the peptide's stability in emulsion systems, pH compatibility (optimal pH 5.0-6.5), and potential interactions with other active ingredients. The peptide is often combined with antioxidants and penetration enhancers to optimize delivery.
For laboratory research, MT2 peptide is used in cell-based assays to study melanocortin receptor signaling, melanogenesis pathways, and pigment regulation. Researchers require high-purity (>99%) peptide with documented batch-to-batch consistency. Typical order quantities range from 5 mg to 100 mg for in vitro studies.
Bulk wholesale customers, including peptide distributors and contract manufacturers, purchase MT2 peptide in gram to kilogram quantities. They require comprehensive documentation, competitive pricing, and reliable supply chains. Bulk orders often include custom packaging, such as pre-weighed aliquots or specialized containers for long-term storage.
mt2 peptide VS Ordinary Low-Grade Peptides
| Item | Our Product (High-Grade MT2) | Alternatives (Low-Grade Peptides) | Advantages |
|---|---|---|---|
| Purity (HPLC) | ≥99% | 90-95% | Higher purity reduces side reactions and improves formulation stability |
| Peptide Content | 80-85% | 60-70% | Accurate dosing with less counter-ion interference |
| Impurity Profile | Single impurity <0.5% | Multiple impurities >2% | Lower risk of unwanted biological effects |
| Documentation | Full CoA, MS, HPLC, AAA | Basic CoA only | Complete traceability for regulatory compliance |
Bulk Purchase Selection Guide
When sourcing MT2 peptide for B2B applications, buyers must navigate common pitfalls and apply rigorous selection standards. The following guide outlines critical factors to consider during the procurement process.
Common Pitfalls: Many buyers fall victim to low-priced offers that compromise on purity or documentation. Incomplete specification sheets, missing third-party test results, and vague manufacturing details are red flags. Additionally, some suppliers misrepresent peptide content, leading to under-dosing in formulations.
Selection Standards: Always request a complete Certificate of Analysis (CoA) with HPLC chromatogram, mass spectrometry data, and amino acid analysis. Verify that the supplier uses GMP-compliant facilities and can provide batch traceability. For cosmetic applications, ensure the peptide meets cosmetic ingredient safety standards.
Buyer Checklist:
- Request full specification sheet including purity, peptide content, and impurity profile
- Verify third-party testing from an independent laboratory
- Confirm storage and handling requirements for your facility
- Ask about custom packaging options for bulk orders
- Review supplier's quality management system and certifications
- Obtain samples for in-house testing before large-scale purchase
Core Product Advantages
Our MT2 peptide offers distinct advantages for B2B buyers seeking reliable, high-quality raw materials for cosmetic formulation and laboratory research. These benefits translate directly into improved product performance and customer satisfaction.
Purity Excellence: With ≥99% purity by HPLC, our MT2 peptide minimizes the risk of impurities that could affect formulation stability or cause unwanted side reactions. Each batch undergoes rigorous quality control to ensure consistent purity across all orders.
Stability Assurance: Our lyophilization process and packaging protocols maintain peptide stability for up to 24 months when stored at -20°C. Accelerated stability studies confirm that the peptide retains >95% purity under recommended storage conditions.
Cost Performance: Competitive pricing for bulk orders without compromising quality. Our efficient manufacturing process and direct supply chain reduce costs while maintaining GMP compliance and full documentation.
Technical Support: Our team of peptide scientists provides formulation guidance, solubility optimization, and stability testing recommendations. We offer custom packaging solutions and expedited shipping for urgent orders.
Frequently Asked Questions
Q: What is the minimum purity requirement for MT2 peptide used in cosmetic formulation?
A: For cosmetic applications, we recommend ≥98% purity by HPLC to ensure formulation stability and minimize potential irritants. Premium formulations benefit from ≥99% purity with controlled impurity profiles. Always request the complete CoA with HPLC chromatogram to verify purity specifications.
Q: How should MT2 peptide be stored to maintain stability during bulk storage?
A: Lyophilized MT2 peptide should be stored at -20°C or below in airtight, light-protected containers. Avoid repeated temperature fluctuations. For long-term storage, consider desiccated conditions to prevent moisture absorption. Reconstituted solutions should be used within 7-14 days when stored at 2-8°C.
Q: What documentation should I request when sourcing MT2 peptide for B2B purposes?
A: Request a complete Certificate of Analysis (CoA) including HPLC purity, mass spectrometry identity confirmation, amino acid analysis, peptide content, and residual solvent testing. Also request Material Safety Data Sheet (MSDS), Certificate of Origin, and any relevant GMP certifications. Third-party testing reports from independent laboratories provide additional quality assurance.