Third-party lab tested
PT-141
For research and laboratory use only. Not for human or animal consumption.
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Lab Tested
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Storage & handling: Store at 2–8 °C (≤ –20 °C long-term), away from light. Ships at ambient temperature.
How we test
Certificates are issued by independent labs. Identity and purity are measured by LC-MS; endotoxin, where listed, by a LAL screen. The latest report for this option: , lot , tested .
How to read your COA
Start with the lot number on the report. Identity confirms by mass spectrometry that the molecule is the one on the label. Purity is the share of the sample that is the target peptide, measured by LC-MS. Endotoxin, where tested, is screened by LAL and must sit below 0.5 EU/mL. The lab name and test date show who ran it and when.
Shipping
Regular tracked: $15 per order, 5 to 10 days. Express tracked: $25 per order, 3 to 5 days. Orders are dispatched within 24–48 business hours. Regular shipping is free on orders over $200 and express on orders over $400, after discounts.
Research & Education Tool
Peptide Dosage Calculator
Enter the vial amount, diluent volume, and target amount to estimate concentration, the draw volume on a U-100 syringe, and approximate vial yield.
For research and educational use only. Check all values against the product label, certificate of analysis, and any applicable professional guidance before relying on the result.
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Buy PT-141 peptide exclusively for research applications in qualified laboratories and academic institutions. Our platform provides secure ordering processes for institutional buyers and research coordinators. We offer discreet and reliable delivery to research facilities nationwide. The formulation is available in standardized configurations to support various research requirements. When you order PT-141 peptide through our system, complete quality documentation is included. This product cannot be sold for human consumption or veterinary applications. No prescription is required for qualified research institutions to buy PT-141 peptide online.
Product overview
Researchers investigate peptide-receptor interaction using PT-141 in experimental settings. Peptide-receptor interaction examines how peptides bind to molecular targets on cells. Laboratory teams explore experimental signaling pathway models in controlled environments. Signaling pathway models are frameworks for studying molecular communication sequences. Scientists conduct controlled laboratory peptide studies under various experimental conditions. Research groups examine how receptor-targeting peptides function in cellular systems. These studies occur exclusively in research environments without clinical applications.
Research focus
PT-141 is investigated in research environments for peptide signaling analysis. Scientists have studied this compound within controlled laboratory models using standardized protocols. The formulation is explored for experimental peptide signaling research in academic facilities. Researchers evaluate the peptide under controlled conditions without outcome claims.
Methodological notes
Store PT-141 in cool, dry, light-protected conditions between 2-8°C. Light-protected conditions mean storage away from direct sunlight and intense artificial lighting. This product is intended for laboratory handling only by qualified research personnel. Qualified personnel have received appropriate training in peptide handling and storage procedures. Avoid moisture exposure as water content can affect peptide stability and quality. Avoid heat exposure above recommended temperature ranges to maintain structural integrity. Structural integrity refers to peptides maintaining their proper molecular configuration. Reconstituted solutions should follow established laboratory guidelines specific to peptide research protocols.
Quality & sourcing
Each PT-141 batch undergoes comprehensive purity verification procedures through analytical testing. Analytical testing uses scientific instruments to measure peptide composition and quality. Our processes ensure batch-to-batch consistency across all research supply orders. Internal quality assurance standards follow research-grade supply positioning for peptide compounds. Research-grade supply means products meet specifications required for scientific laboratory use. Testing protocols verify peptide purity and structural characteristics using validated methods. Every unit meets our specifications before receiving distribution approval. Laboratory certificates accompany each order for institutional tracking and compliance documentation.
Chemical properties
- CAS: 189691-06-3
- Chemical Formula: C₅₀H₆₈N₁₄O₁₀
- Molecular Weight: 1025.182 g/mol
- Peptide Sequence: Ac-Nle-Asp(1)-His-D-Phe-Arg-Trp-Lys(1)
- Synonyms: PT141
- Shelf life: 24 months from the manufacturing date.
PT-141 is a synthetic peptide consisting of seven amino acids in sequence. This heptapeptide is designed to interact with specific molecular receptor systems. Heptapeptide means a peptide containing exactly seven amino acid units. Receptor signaling means the process by which peptides trigger cellular responses. Cellular responses occur when receptors bind to peptides and initiate molecular changes. Signaling peptides are studied in research to understand molecular communication mechanisms. Molecular communication describes how cells exchange information through chemical messengers. Researchers investigate how synthetic peptides interact with melanocortin receptor systems. Melanocortin receptors are protein structures studied in experimental research models. Laboratory research examines peptide binding patterns, selectivity, and structural characteristics.
Key features
PT-141 provides a synthetic research peptide formulation developed for scientific applications. Synthetic peptides are manufactured compounds created through chemical synthesis processes. Each batch undergoes high-purity testing to ensure compound consistency across orders. The formulation is designed for controlled laboratory environments conducting receptor research. Receptor research examines how peptides interact with specific protein structures on cells. Secure packaging with discreet shipment protects the peptide during transit to research facilities.
Express tracked
- Tracked door to door, dispatched within 24–48 business hours
- Ambient shipping, safe for lyophilized peptides
Regular tracked
- Free on orders over $200
- Tracked door to door, dispatched within 24–48 business hours
What is PT-141 and which receptor does it target in research models?
PT-141 (Bremelanotide) is a synthetic cyclic heptapeptide analogue of alpha-melanocyte-stimulating hormone (α-MSH). It is a non-selective agonist at melanocortin receptors, with documented activity at MC1R, MC3R, and MC4R in research models. Unlike earlier melanocortin compounds, PT-141 lacks the oxidation-labile methionine residue, contributing to improved chemical stability. Research uses PT-141 as a pharmacological tool for investigating melanocortin receptor pharmacology across subtypes.
What signalling cascades does melanocortin receptor activation produce in research?
Melanocortin receptors (MC1R–MC5R) are all Gs-coupled GPCRs that activate adenylyl cyclase, raising intracellular cAMP and activating PKA. In research models, MC4R activation in hypothalamic cell systems has been studied for effects on feeding behaviour regulatory circuits, autonomic nervous system output, and cardiovascular signalling. MC1R activation in melanocyte cell lines is characterised by increased melanogenesis. Comparative activation profiles across receptor subtypes are determined using cAMP accumulation assays in individually transfected cell systems.
How is PT-141 selectivity profiled in research?
Selectivity profiling of PT-141 across the five melanocortin receptor subtypes (MC1R–MC5R) uses cAMP accumulation assays in cell lines transiently or stably expressing each receptor, with native α-MSH and receptor-selective reference agonists as comparators. PT-141 shows significant activity at MC1R, MC3R, and MC4R. Its relatively low selectivity for individual subtypes makes it a useful pan-MC agonist tool compound for research requiring activation of multiple melanocortin receptor types simultaneously.
What analytical verification is required for PT-141 research compound?
PT-141 is a cyclic lactam peptide; identity confirmation must verify both the linear sequence and the cyclisation between the side chains of Asp3 and Lys7. Mass spectrometry should confirm the expected molecular weight (~1025 Da for the free acid form). The cyclic structure should be distinguished from the linear form by MS/MS fragmentation analysis. LC-MS purity documentation confirms absence of linear precursor and other synthesis impurities.
Is PT-141 approved for human use outside of research?
PT-141 (Bremelanotide) has received regulatory approval for specific clinical indications in certain jurisdictions. However, PT-141 as supplied by Elivena is a research-grade compound for use in controlled laboratory settings only, and is not supplied for personal therapeutic administration outside of formally regulated clinical contexts.
Lab report for lot
View all lab reportsNo certificate is on file for the 5 mg option yet. On file for:
- Lot · 10 mg
- 395407
- Tested
- Mar 28, 2026
- Labeled
- 10 mg
- Measured
- 12.07 mg
| Test | Method | Result | Status |
|---|---|---|---|
| Identity | LC-MS | Confirmed PT-141 | PASS |
| Purity | LC-MS · spec >99% | 99.51% | PASS |
| Net content | LC-MS quantitation | 12.07 mg of 10 mg | PASS |
| Appearance | Visual | White lyophilized | REPORTED |
| Endotoxin | LAL (Endosafe PTS) | ≤ 0.05 EU/mL limit 0.5 | PASS |
Batch tests: Purity, Endotoxins
2 lab reports available to signed-in researchers.
- CAS: 189691-06-3
- Chemical Formula: C₅₀H₆₈N₁₄O₁₀
- Molecular Weight: 1025.182 g/mol
- Peptide Sequence: Ac-Nle-Asp(1)-His-D-Phe-Arg-Trp-Lys(1)
- Synonyms: PT141
- Shelf life: 24 months from the manufacturing date.
PT-141 is a synthetic peptide consisting of seven amino acids in sequence. This heptapeptide is designed to interact with specific molecular receptor systems. Heptapeptide means a peptide containing exactly seven amino acid units. Receptor signaling means the process by which peptides trigger cellular responses. Cellular responses occur when receptors bind to peptides and initiate molecular changes. Signaling peptides are studied in research to understand molecular communication mechanisms. Molecular communication describes how cells exchange information through chemical messengers. Researchers investigate how synthetic peptides interact with melanocortin receptor systems. Melanocortin receptors are protein structures studied in experimental research models. Laboratory research examines peptide binding patterns, selectivity, and structural characteristics.
Read the lot first.
Identity confirmed
LC-MS confirms the molecule in the vial is PT-141.
Purity measured
The same LC-MS run measures the share that is the target peptide.
Endotoxin screened
A LAL screen checks bacterial endotoxin against a limit.
Lot-linked report
Each report names the lot it was run on.
Each lab report is tied to its lot.
Reports are issued by independent labs and name the lot they were run on.
How we testLab report, for the lot tested.
Lot numberPrinted on the report, so you can see which lot was tested.
Synthesis and lyophilization
Synthesized and freeze-dried in US facilities, then given a lot number.
Samples go to third-party labs
Finished vials from the lot are sent to independent labs.
LC-MS: identity, purity, net content
One run confirms the molecule and measures its purity.
LAL endotoxin screen
Bacterial endotoxin is checked against a 0.5 EU/mL limit.
Certificate published
The summary goes on the product page; full PDFs are for signed-in researchers.
Store at 2 to 8 °C. Keep sealed and away from light until use.
Save up to 25%.
Build the researcher’s box: any compounds, any doses, one order, and every vial costs less.
Delivered tracked, every order.

Shipping options
Dispatched in 24–48 business hours.
Regular tracked$15 per order · 5 to 10 days
Express tracked$25 per order · 3 to 5 days
Free shippingRegular over $200 · express over $400, after discounts
Testing that sets a higher standard.
Certificates come from independent labs, and each result sits next to its method.
Researchers often ask
Is PT-141 for human use?
No. PT-141 is sold for laboratory research only. It is not for human or veterinary use, and it is not a drug, food or cosmetic.
How do I find the lab report?
Use View COAs on the product page, or search the COA library by compound name. The summary is public; the signed PDF reports are available to signed-in researchers.
Why is purity measured by LC-MS?
LC-MS separates the sample and identifies each component by its mass, so one run confirms identity and measures purity.
When will my order ship?
Orders are dispatched within 24–48 business hours. Regular tracked delivery takes 5 to 10 days and express tracked 3 to 5 days. Regular shipping is free on orders over $200 and express on orders over $400, after discounts.
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