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.

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PT-141 (10mg) COA

Product COA

Product: PT-141 (10mg)

Batch: EP-250424-PT10

Expiration: 04/24/2027

PT-141