Tesamorelin: identity, research literature, and verified purity
99.366%assayed by HPLC at Janoshik
The lot currently shipping assayed 99.366% by third-party HPLC at Janoshik, and that certificate is published here with a key you can confirm with the laboratory yourself.
Identity and registry data
- CAS
- 218949-48-5
- Molecular formula
- C221H366N72O67S
- Molar mass
- 5135.86 g/mol
- PubChem CID
- 16137828
- UNII
- MQG94M5EEO
Also known asTH9507 · TH-9507 · GHRH(1-44) analog · Trans-3-hexenoyl-GHRH(1-44)-NH2
What the research literature covers
The characterization below reflects published research literature only. It describes what that literature examines; it is not a statement about use in people. Tesamorelin is investigational research material and is not an approved product.
Tesamorelin is a synthetic analogue of human growth-hormone-releasing hormone — a 44-residue GHRH(1-44) peptide bearing an N-terminal acyl (trans-3-hexenoyl) modification that stabilizes it against enzymatic degradation — supplied as a lyophilized powder for laboratory research use only.
It is a growth-hormone-axis research peptide (a growth-hormone-releasing-hormone analogue); the characterization here reflects the research literature only.
Reported mechanism · literatureCharacterized in the research literature as a growth-hormone-releasing-hormone analogue stabilized against N-terminal enzymatic degradation; the summary reflects that literature only.
- Growth hormone axis
- Metabolic signalling
Purity, and how to check it yourself
Purity here is a measurement, not a position. The lot currently shipping was analysed by Janoshik, an independent laboratory, by HPLC for identity and assayed purity. We do not test our own material.
- Lot
- Red
- Analysed
- October 30, 2025
- Assayed purity
- 99.366%
- Testing laboratory
- Janoshik
- Verify key
- 7QP6JH56B1AJ
Enter that key at janoshik.com/verify and the laboratory returns the report it issued for this batch. You are confirming the result with them, not with us. The full certificate is published as a PDF on the Tesamorelin certificate page.
We report HPLC identity and assayed purity only. We do not run heavy-metal, microbial, endotoxin, or sterility analysis, and we do not claim it anywhere on this site.
Handling and stability
- Lyophilized
- −20°C · 24 months (sealed, desiccated)
- Reconstituted
- 2–8°C · weeks (research handling)
Reconstitution solvent: sterile water. Reconstitution parameters are a laboratory-handling matter determined by the researcher; no in-vivo or human-use parameters are provided. The concentration arithmetic for a reconstituted research solution is available in our reconstitution calculator.
Questions
What is Tesamorelin?
Tesamorelin is a synthetic analogue of human growth-hormone-releasing hormone (a stabilized GHRH(1-44) peptide). Ouralus supplies it as a lyophilized powder for laboratory research use only.
What is the molecular formula of Tesamorelin?
The reported molecular formula is C221H366N72O67S (molar mass ≈ 5136 g/mol; PubChem CID 16137828, CAS 218949-48-5). It is a 44-residue growth-hormone-releasing-hormone (GHRH 1-44) analogue with an N-terminal acyl modification.
Is Tesamorelin third-party tested?
Yes. The lot currently shipping was analysed by Janoshik, an independent laboratory, by HPLC for identity and assayed purity, and assayed 99.366%. The certificate carries verify key 7QP6JH56B1AJ, which you can confirm directly at janoshik.com/verify.
Is Tesamorelin an approved product?
No. Tesamorelin is supplied strictly as a research chemical for laboratory research use only. It is not a drug, not a supplement, and not a food, and it is not for human or animal consumption.
Selected literature
- Analysis of growth hormone releasing hormone and its analogs in urine using nano liquid chromatography coupled with quadrupole/orbitrap mass spectrometryUçaktürk E, et al. · Journal of Pharmaceutical and Biomedical Analysis · 2026PMID 41138283 ↗
- Advances in the detection of growth hormone releasing hormone synthetic analogsMemdouh S, et al. · Drug Testing and Analysis · 2021PMID 34665524 ↗
Research-literature characterization, provided for research context only. For laboratory research use only. Not for human consumption.