Order PT-141 10mg from Eternal Peptides, a trusted U.S. based supplier of research compounds verified by leading third-party labs with COAs. Each PT-141 10mg lot is independently tested for 99%+ purity and competitively priced, with free USPS Priority shipping on orders over $200. Sold for research use only.
PT-141 Peptide Characteristics
| Property | Description |
| Name | PT-141 (Bremelanotide); synthetic cyclic heptapeptide melanocortin receptor agonist derived from α-MSH analog research |
| Sequence | Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH |
| Molecular Formula | C₅₀H₆₈N₁₄O₁₀ |
| Molecular Weight | ~1025.2 g/mol (free base; slight variation may occur depending on salt form) |
| PubChem CID | 9941379 |
| Product Form | Lyophilized powder in sterile research vials (e.g., 10mg per vial) |
| Purity | Typically ≥99%, verified through independent third-party analysis; lot-specific COA available |
| Solubility | Soluble in sterile water or bacteriostatic water for laboratory reconstitution; forms a clear solution when properly handled |
| Structure Type | Cyclic peptide with modified amino acids (including norleucine and D-phenylalanine) to enhance receptor stability and activity |
Handling & Storage Guidelines
Proper handling and storage of PT-141 are essential to preserve structural integrity, receptor-binding reliability, and reproducibility in laboratory settings. As a cyclic synthetic peptide supplied in lyophilized form, it should be protected from temperature fluctuations, light exposure, and moisture prior to reconstitution.
- Storage (Unreconstituted): Store lyophilized vials refrigerated at 36–46°F (2–8°C). For extended storage, freezing at or below 14°F (-10°C) is recommended. Keep sealed, dry, and shielded from direct light.
- Reconstitution: Reconstitute under sterile laboratory conditions using sterile water or bacteriostatic water. For the best stability, purity, and consistent results, get bacteriostatic water with your PT-141 order. Add diluent slowly along the vial wall and gently swirl; avoid vigorous shaking.
- Aliquoting & Freeze–Thaw: If multiple uses are anticipated, divide into sterile aliquots to minimize repeated freeze–thaw cycles, which may compromise peptide stability.
- Working Solution Storage: After reconstitution, store at 36–46°F (2–8°C) and use within standard laboratory timeframes. Avoid prolonged room temperature exposure.
- Laboratory Compliance: Handle with appropriate PPE and follow institutional biosafety, documentation, and disposal protocols. Supplied strictly for research use only.
COA / Quality Assurance
Quality verification is essential for reproducible melanocortin receptor research. Every PT-141 product lot is accompanied by a lot-specific Certificate of Analysis (COA), ensuring analytical confirmation prior to distribution. Eternal Peptides partners with independent third-party laboratories, including Janoshik, to provide objective verification of identity, purity, and quality metrics.
Each COA typically includes:
- Peptide Identity Confirmation: Analytical verification using High-Performance Liquid Chromatography (HPLC) and/or mass spectrometry to confirm structural composition.
- Purity Analysis: Quantitative purity assessment (commonly ≥99%) to evaluate impurity profile and batch consistency.
- Sterility Testing (if applicable): Microbial screening where relevant to product format.
- Endotoxin Testing: Measurement to confirm acceptable laboratory handling thresholds.
- Storage & Stability Guidance: Recommended temperature and handling parameters to preserve integrity.
All COAs are batch-specific, fully traceable, and accessible through the Lab Tests page to support research reproducibility, documentation standards, and audit compliance.
Legal / Regulatory Disclaimer
PT-141 is supplied by Eternal Peptides strictly for laboratory research use only. It is not approved for human or veterinary use, clinical administration, therapeutic application, or diagnostic procedures of any kind. The safety, efficacy, and pharmacological effects of this compound in humans or animals have not been fully established outside approved regulatory contexts.
Purchasers and end users are solely responsible for ensuring compliance with all applicable local, state, and federal laws, as well as institutional biosafety standards and research-use regulations. Misrepresentation of the intended use of this product may result in regulatory enforcement actions or legal consequences.
Always quality-tested, verified with third-party COAs
At every step, we prioritize quality by conducting rigorous third-party testing on all our products. These tests focus on five key characteristics — identity, purity, sterility, endotoxin levels, and heavy metal content — ensuring that each product meets the highest standards of quality, with independent third-party Certificates of Analysis (COAs) to verify our commitment to excellence.
Identity Test
Identity testing ensures that the product contains the correct ingredient as labeled, verifying its authenticity and matching it to established reference standards.
Purity Test
Purity and concentration testing verifies that the ingredient is present in the correct amount, with a purity of 99% or higher to meet stringent quality standards.
Sterility Test
Sterility testing ensures that the product is completely free from bacteria, fungi, and other microorganisms.
Endotoxin Test
Endotoxicity testing specifically detects and quantifies lipopolysaccharides (LPS), components of bacterial cell walls, to ensure the product is free from endotoxins.
Heavy Metals Test
Heavy metals testing ensures that the product is free of heavy metals such as lead, arsenic, mercury, cadmium, and other heavy metals.
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