Quality assurance

Certificate of Analysis Sample

Every Nexyra Labs lot ships with a Certificate of Analysis from an independent laboratory. Below is a representative example for GHK-Cu, lot NX-GHK-2604-A.

Sample HPLC chromatogram for GHK-Cu showing a single dominant peak at 98.7% purity

HPLC chromatogram — identity and purity by retention time and integrated peak area.

Sample ESI-MS spectrum for GHK-Cu showing [M+H]+ at m/z 341.4

ESI-MS — molecular weight confirmation. Observed [M+H]⁺ 341.4 matches theoretical MW 340.38 g/mol.

What we test for

Identity confirmation via HPLC retention time
Purity quantification (≥98%)
Molecular weight confirmation via MS
Appearance and physical characteristics

Sample shown for illustration. Your order's COA references your actual lot and synthesis date. Sample values are typical, not guaranteed; the released COA is authoritative.