Tesamorelin (TH9507) Testing & Verification
Get your Tesamorelin (TH9507) independently verified by reversed-phase HPLC-UV. KMD Analytical confirms what the material is, how pure it is, and how much peptide is actually in the vial — measured against a certified reference standard.
What Tesamorelin is
Tesamorelin, developed under the code TH9507, is a synthetic 44-amino-acid peptide and a stabilized analog of human growth hormone-releasing hormone (GHRH 1-44). Its defining chemical feature is an N-terminal acylation — a trans-3-hexenoic acid group attached to the peptide's N-terminus — which sets it apart structurally from unmodified GHRH. It is commonly supplied as a lyophilized (freeze-dried) acetate salt in sealed vials and is most often sold on the research-chemical market rather than as a finished, regulated product. Because it is a longer and more complex peptide than many growth-hormone secretagogues, its synthesis fidelity and identity are correspondingly harder to get right — which is precisely why independent verification is worthwhile.
Why get your Tesamorelin independently tested
- Identity vs. cheaper substitutes: the N-terminal trans-3-hexenoic acid modification is what makes Tesamorelin Tesamorelin. Without an identity check, unmodified GHRH(1-44) or cheaper growth-hormone secretagogues like sermorelin (GHRH 1-29) or CJC-1295 can pass visually as the same white powder. A retention-time and UV-spectral match against a certified reference standard is the direct way to confirm the vial holds the modified peptide you paid for.
- Long-chain synthesis purity: at 44 residues, Tesamorelin is a comparatively long peptide to assemble, and every additional coupling step is another chance to accumulate deletion or truncated sequences. Chromatographic purity reported as area percent shows whether the main peak genuinely dominates or is shadowed by closely related synthesis by-products.
- Degradation in mishandled lyophilate: the Tesamorelin sequence contains an oxidation-prone methionine residue, and peptides of this length are also susceptible to deamidation. Improper drying, storage, or shipping can erode purity over time, and those degradation products show up as additional peaks in the chromatogram.
- Net-peptide content vs. label: lyophilized vials are sold by labeled milligrams, but that fill weight can include acetate counterions, residual moisture, and bulking excipient such as mannitol. A net-peptide assay reports the actual milligrams of peptide per vial, independent of total powder weight, so you can see whether the vial is underfilled relative to its claim.
What we measure on Tesamorelin
Every Tesamorelin sample is run by reversed-phase HPLC with UV/diode-array detection at 214 nm against a certified reference standard. We report exactly three things: identity, by matching retention time and UV spectrum to the reference; chromatographic purity, as the area percent of the main peak relative to detectable related impurities; and net-peptide assay, the milligrams of peptide per vial. Together these confirm what the material is and how much peptide is actually present — not merely the total weight of powder in the vial.
Every result is issued as a certificate of analysis you — or anyone you forward it to — can verify cryptographically. Reporting identity, purity, and milligram content is the point: a vial can be pure and still underfilled, so we report all three. More on purity vs. net-peptide content and how to read a peptide COA.
Our scope — stated plainly
Testing is RP-HPLC-UV against a certified reference standard. Because Tesamorelin is a less common peptide than mainstream secretagogues, we may need to source and qualify a reference standard before analysis, which can add lead time. This is an identity, purity, and content analysis only — it is not mass spectrometry and does not include sterility, endotoxin, heavy-metal, or residual-solvent testing. KMD Analytical is an independent laboratory.
KMD is an independent RP-HPLC-UV lab. We do not run LC-MS / mass-spec, sterility, endotoxin, or heavy-metal testing. If your job needs a capability we don't have, we'll say so.
Tesamorelin testing — FAQ
Can you tell Tesamorelin apart from plain GHRH or sermorelin?
Yes — that is what identity testing is for. We compare your sample's retention time and UV spectrum to a certified Tesamorelin reference standard. Because Tesamorelin's N-terminal acylation changes its chromatographic behavior relative to unmodified GHRH(1-44) or shorter secretagogues like sermorelin, a reference-matched run is the direct way to confirm you have Tesamorelin and not a cheaper or unmodified substitute. We report identity as a match or no-match against that standard.
Does the milligram number printed on my vial mean milligrams of peptide?
Not necessarily. Lyophilized vials are labeled by fill weight, which can include acetate counterions, residual moisture, and bulking agents. Our net-peptide assay reports the actual milligrams of Tesamorelin peptide per vial, so you can compare the real peptide content to what the label claims.
Do you confirm molecular weight or run mass spectrometry?
No. We verify identity by retention-time and UV-spectral match against a certified reference standard using RP-HPLC-UV, not by mass spectrometry. We do not measure molecular weight directly, and we do not perform sterility, endotoxin, heavy-metal, or residual-solvent testing.
Other peptides we test
Retatrutide · Cagrilintide · BPC-157 · TB-500 · see the full panel.