Third-party lab tested
20 Apr 202699.27% purityIdentity, purity & endotoxin testedLot IGFR12172025-J
IGF-1 LR3
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: Identity, purity & endotoxin tested, lot IGFR12172025-J, tested 20 Apr 2026.
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.
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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
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Buy IGF-1 LR3 peptide online through our secure research supply platform designed for institutional procurement. When you order IGF-1 LR3 peptide online, the process accommodates laboratory purchasing requirements and documentation needs. Our platform allows researchers to buy IGF-1 LR3 peptide with confidence in product quality and delivery reliability. Order IGF-1 LR3 peptide directly for your research facility with discreet and secure shipping. This product is furnished for in-vitro studies only and is not for human consumption. Not approved by regulatory agencies to prevent, treat, or cure any medical condition. Bodily introduction into humans or animals is strictly forbidden by law. The secure ordering process protects institutional information and research project confidentiality. Reliable delivery ensures research compounds arrive intact and ready for laboratory storage.
Product overview
Researchers investigate IGF-1 LR3 peptide within controlled laboratory environments to examine modified peptide structures and molecular mechanisms. Experimental cell culture models utilize this compound to study peptide analog characteristics in vitro. Controlled laboratory peptide stability studies assess compound properties under standardized experimental conditions. Scientists explore structural modifications and binding protein interactions in research settings. Laboratory personnel examine modified peptide behavior in experimental models designed for growth factor analog research. These investigations occur exclusively in controlled research environments without clinical applications.
Research focus
IGF-1 LR3 is investigated in research environments to understand modified growth factor peptide mechanisms. This compound is studied within controlled laboratory models examining peptide analog properties. Researchers explore this peptide for experimental peptide research applications in academic and institutional settings. Laboratory studies examine the compound’s structural characteristics under standardized protocols. Scientists investigate molecular properties relevant to growth factor analog research methodologies. All research applications remain confined to laboratory environments and experimental frameworks.
Methodological notes
Store IGF-1 LR3 peptide at -20°C for optimal long-term stability before reconstitution. Storage temperature should remain consistent to maintain compound integrity. Keep the product sealed until ready for laboratory use. Laboratory handling should occur only by qualified research personnel trained in peptide research protocols. Avoid exposure to moisture, heat, and direct sunlight during storage. Use appropriate laboratory equipment when handling this research compound. Reconstitution should follow standard laboratory peptide preparation procedures using sterile techniques. After reconstitution, store at 2-8°C according to institutional protocols. Maintain proper documentation of handling and storage conditions for research records. Dispose of unused material according to institutional laboratory waste protocols.
Quality & sourcing
Each batch undergoes comprehensive purity verification procedures to confirm research-grade quality. Third-party testing validates compound purity at 99%+ by LC-MS analysis. Batch-to-batch consistency ensures reliable results across research protocols. Certificate of Analysis accompanies each order documenting purity verification results. Internal quality assurance standards maintain strict compound specifications. Testing procedures verify molecular weight, purity percentage, structural modifications, and compound identity. Research-grade supply positioning ensures suitability for controlled laboratory investigations. Quality control documentation supports institutional research compliance requirements.
Chemical properties
- CAS: 946870-92-4
- Chemical Formula: C₄₀₀H₆₂₅N₁₁₁O₁₁₅S₉
- Molecular Weight: 9117.60 g/mol
- Peptide Sequence: MFPAMPLSSL–FVNGPRTLCG–AYGGSCASFR–RGFYFNKPTG–YGSSTKKAYG–NNYRRHPLLK–PPIKSAQG
- Synonyms: Long R3-IGF-1, M9L22Y19H9, 143045-27-6, Long-(arg3)insulin-like growth factor-i, IGF-I analog
- Shelf life: 24 months from the manufacturing date.
IGF-1 LR3 is a synthetic modified peptide analog compound produced for research applications. This peptide is a modified version of insulin-like growth factor with structural alterations. The modification includes additional amino acids creating an extended peptide chain. The “Long R3” designation refers to the specific structural modification present. Modified peptides are studied to understand how structural changes affect molecular properties. This analog demonstrates altered binding characteristics with binding proteins in experimental systems. This synthetic peptide origin ensures batch-to-batch consistency for research protocols. The compound consists of a defined amino acid sequence with specific modifications. Researchers examine this modified peptide’s properties within controlled laboratory conditions without therapeutic context.
Key features
This synthetic research peptide formulation provides laboratories with a modified insulin-like growth factor compound for experimental studies. The compact 1mg format supports controlled research applications in qualified laboratory settings. Each batch undergoes rigorous purity verification to ensure consistency across research protocols. High-purity formulation meets research-grade standards for modified growth factor investigations. Secure packaging protects compound integrity during storage and transport. Discreet shipment ensures confidential delivery to research facilities and institutional laboratories.
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 distinguishes the LR3 modification from native IGF-1?
The LR3 modification involves structural changes to the peptide sequence including additional amino acids. These modifications alter the peptide’s binding characteristics with binding proteins in experimental systems. Researchers study this analog to understand how structural modifications affect peptide properties and binding interactions in controlled laboratory conditions.
What are typical research applications for this modified growth factor?
Research applications include peptide modification studies, binding protein interaction characterization, structural-activity relationship investigations, and comparative analyses between modified and native growth factors. Specific applications depend on research objectives and experimental design. Research teams determine protocols based on their investigation goals in cell culture and molecular studies.
What special storage considerations apply to this peptide?
IGF-1 LR3 requires storage at -20°C before reconstitution for optimal long-term stability. After reconstitution, the peptide should be stored at 2-8°C and used according to institutional laboratory protocols. Proper storage conditions are critical for maintaining peptide integrity. Researchers should follow institutional guidelines for peptide storage and handling.
Lab report for lot IGFR12172025-J
View all lab reports- Lot
- IGFR12172025-J
- Tested
- Apr 20, 2026
| Test | Method | Result | Status |
|---|---|---|---|
| Identity | LC-MS | Confirmed IGF-1 LR3 | PASS |
| Purity | LC-MS · spec >99% | 99.27% | 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: 946870-92-4
- Chemical Formula: C₄₀₀H₆₂₅N₁₁₁O₁₁₅S₉
- Molecular Weight: 9117.60 g/mol
- Peptide Sequence: MFPAMPLSSL–FVNGPRTLCG–AYGGSCASFR–RGFYFNKPTG–YGSSTKKAYG–NNYRRHPLLK–PPIKSAQG
- Synonyms: Long R3-IGF-1, M9L22Y19H9, 143045-27-6, Long-(arg3)insulin-like growth factor-i, IGF-I analog
- Shelf life: 24 months from the manufacturing date.
IGF-1 LR3 is a synthetic modified peptide analog compound produced for research applications. This peptide is a modified version of insulin-like growth factor with structural alterations. The modification includes additional amino acids creating an extended peptide chain. The “Long R3” designation refers to the specific structural modification present. Modified peptides are studied to understand how structural changes affect molecular properties. This analog demonstrates altered binding characteristics with binding proteins in experimental systems. This synthetic peptide origin ensures batch-to-batch consistency for research protocols. The compound consists of a defined amino acid sequence with specific modifications. Researchers examine this modified peptide’s properties within controlled laboratory conditions without therapeutic context.
Read the lot first.
Identity confirmed
LC-MS confirms the molecule in the vial is IGF-1 LR3.
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 reportIdentity, purity & endotoxin tested, 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 IGF-1 LR3 for human use?
No. IGF-1 LR3 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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