PT-141 is Melanotan-2's more focused cousin — the melanocortin receptor agonist most known for its role in sexual-response and libido research. It has a much more selective receptor profile than MT-2, which means fewer collateral effects on pigmentation and appetite.

ProSource Labs supplies PT-141 (Bremelanotide) in the following available vial sizes: 10mg. Each PT-141 (Bremelanotide) vial contains pure lyophilized peptide — no fillers, no bulking agents. Product SKU references: PT151-10MV10MG.

• Libido Focus: The most-studied melanocortin peptide for sexual-response research
• Selective Receptor: Focuses on MC3R/MC4R more than MT-2's pan-receptor activity
• Nasal Delivery: Research protocols often use intranasal administration
• FDA-Approved Sibling: The clinical version is an FDA-approved sexual-dysfunction drug

Batches are characterized by ESI mass spectrometry to confirm molecular weight against the theoretical value, with amino-acid sequence confirmation on selected QA lots. Peptide content assay distinguishes net peptide mass from residual counter-ion salt.

Lyophilized PT-141 (Bremelanotide) vials should be stored at -20°C (or colder) in a laboratory freezer, inside the sealed factory container. Minimize warm-up cycles — move only the specific vial needed for a given experiment out of frozen storage at a time.

All laboratory handling of PT-141 (Bremelanotide) should follow the receiving institution's SOPs and applicable peer-reviewed protocols relevant to the researcher's specific experimental question. ProSource Labs does not publish end-user preparation or usage instructions.

Every batch of PT-141 (Bremelanotide) released by ProSource Labs undergoes independent reverse-phase High Performance Liquid Chromatography (HPLC) — the industry-standard analytical method for this class of research compound. Target chromatographic purity is typically ≥ 99%.

Additional characterization may include ESI mass spectrometry for molecular weight confirmation, Karl Fischer titration for residual moisture, and appearance/solubility inspection. A batch-specific Certificate of Analysis (COA) is available on request through customer support after purchase.

Each production lot of PT-141 (Bremelanotide) is quarantined pending analytical release, tested against documented purity, identity, and moisture acceptance criteria, and only released to sellable inventory after passing every QA checkpoint. Batches that fail any single criterion are quarantined and never reach customer-facing inventory.

If a vial of PT-141 (Bremelanotide) you received from ProSource Labs ever fails your own institution's incoming QA testing, contact customer support at support@prosourcelabs.org — we retain samples of every batch for cross-verification.

Research on sexual-response brain circuits, central nervous system melanocortin signaling, and MC3R/MC4R receptor biology. The go-to research tool in the libido-research space.

PT-141 (Bremelanotide) vials ship in tamper-evident, moisture-resistant, cold-chain-friendly outer packaging from our Southern California distribution facility for fast US domestic delivery — typically 2-4 business days coast-to-coast, with expedited options available at checkout.

Every PT-141 (Bremelanotide) shipment is discreet — the outer packaging carries no product-specific branding or direct reference to the compound name inside, protecting researcher privacy. Tracking numbers are emailed automatically. For institutional or high-volume orders, dedicated wholesale pricing is available through the wholesale portal.