Hormones

HGH — amount, purity, dimer and HMWP

Amount, purity, dimer and higher-molecular-weight proteins in one certificate.

Growth hormone needs more than a purity percentage. Aggregates and dimers are the failure mode that a simple HPLC number hides, so this test reports amount, purity, dimer content and higher-molecular-weight proteins separately.

What this test tells you

Identity — LC-MS

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

Content — quantitative HPLC

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

Purity — HPLC-UV

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

A verifiable report

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

Parameters

Target compound	Human Growth Hormone (somatropin)
Testing method	SEC-HPLC + RP-HPLC + ESI-LC-MS
Result format	IU and mg per vial, purity %, dimer %, HMWP %
Minimum sample	1 whole unopened vial (minimum 4 IU)

Frequently asked questions

Why does dimer matter?

Aggregated protein is immunogenic and inactive. A 99% purity figure can still hide several percent dimer.

Additional services

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

Optional add-ons

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