Hormones

HGH fragment 176-191 / AOD-9604

Fragment peptides with tight mass tolerances — substitution is common.

HGH fragment 176-191 and AOD-9604 are close relatives sold under each other's names. LC-MS plus elemental composition resolves which one you have.

What this test tells you

Confirms the molecule is what the label claims, by measuring the mass of the eluting ions. Catches substitution and the wrong compound entirely.

How much is actually in the vial, compared against the declared strength and reported as a percentage of claim.

Area percent of the main peak, with the chromatogram attached so the figure can be checked rather than trusted.

A report ID and unique key that resolve to a public record. Anything that does not resolve is not a genuine report.

Parameters

Target compounds	HGH fragment 176-191, AOD-9604
Testing method	RP-HPLC-UV + ESI-LC-MS + CHNS
Result format	mg per vial, purity %, identity confirmed
Minimum sample	1 whole unopened vial, or 20 mg raw API

Frequently asked questions

Are they the same molecule?

No. AOD-9604 is a modified fragment; the masses differ and LC-MS separates them.

Additional services

Add any of these to the same vial, on the same certificate.

Raw data packageChromatogram and mass spectrum as open files, not just PDF.
+$18
pH measurementMeasured on reconstituted sample, reported to 0.01.
+$27
Fentanyl presence screenTargeted LC-MS screen. Reported present / not detected.
+$55
Variance testingTwo independent injections from the same vial, reported separately.
+$55
Additional report copyA second certificate issued under a different origin label.
+$37
Heavy metals (ICP-MS)As, Cd, Pb, Hg. Reported per element, <0.01 ppm.
+$125
Endotoxin (LAL)Kinetic LAL, reported in EU/mg. Requires a second vial of the same compound.
+$210
CHNS mass reportElemental composition, independent of the HPLC assay.
+$105
LC-MS contamination screenScreens for unrelated peptides and small molecules.
+$150
Sterility (TAMC + TYMC)Compendial sterility. 14-day incubation. Requires a second vial.
+$179
TFA content analysisResidual trifluoroacetic acid, reported as % w/w.
+$210