Catalogue / Tesamorelin
Tesamorelin
A GRF (1-44) analogue carrying a trans-3-hexenoyl group on the N-terminal tyrosine, making it the longest of the commonly submitted GRF analogues.
| Class | Growth hormone secretagogues |
| Determination | Peptide analysis, specialist compound |
| Price | 590 USD |
Tesamorelin is identified against a certified reference standard rather than against a published mass, because commercially supplied material varies in composition between suppliers. Purity is reported separately by reversed-phase chromatography at 214 nm and describes the chromatographable fraction only.
| At 44 residues the synthesis is long enough that deletion sequences are a genuine population, not a rounding error. |
| The hexenoyl modification is what distinguishes this compound from plain GRF (1-44). Material lacking it is 96 daltons lighter. |
| No mass figure is published here because the modification chemistry varies between suppliers. Identity is established against a certified reference standard at the time of analysis. |
Every compound fails in its own way. A generic peptide method applied without regard to these specifics produces a number that looks like a result and is not one.
Short synthetic peptides, most carrying D-amino acids or unnatural residues that make them resistant to serum peptidases and invisible to sequence-only reasoning.
LC-MS identity against a certified reference standard, purity by RP-HPLC at 214 nm. D-isomers are not resolved by a conventional C18 column and are not claimed to be.
Where the delivered milligram figure matters rather than the percentage, net peptide content by combustion analysis and water by Karl Fischer are added, and the certificate carries a closed mass balance instead of a single purity number.
| LC-MS identity | Measured mass |
| RP-HPLC purity | Area at 214 nm |
| Net peptide content | Milligrams |
| Water content | Karl Fischer |
| Counter-ion | Ion chromatography |
| Bacterial endotoxins | USP <85> |
What is the molecular weight of Tesamorelin?
No molecular weight is published for Tesamorelin on this page, because the composition of commercially supplied material varies between suppliers and an unverified figure on an analytical site is worse than an absent one. Identity is established against a certified reference standard at the time of analysis.
How is Tesamorelin tested for purity and identity?
LC-MS identity against a certified reference standard, purity by RP-HPLC at 214 nm. D-isomers are not resolved by a conventional C18 column and are not claimed to be. Purity describes the chromatographable fraction only and is not the same quantity as the peptide mass delivered per vial.
What goes wrong when Tesamorelin is analysed?
At 44 residues the synthesis is long enough that deletion sequences are a genuine population, not a rounding error.
What does Tesamorelin analysis cost at ANALYTON?
Peptide analysis, specialist compound is priced at 590 US dollars, covering the determinations described on this page. Content, safety and elemental determinations are ordered alongside and are priced separately on the price list.
Other compounds in this class
Updated 2026-09-01. Masses computed at build, not transcribed.