Each batch is analyzed by HPLC and mass spectrometry before it ships. Enter a lot number to pull its certificate of analysis.
Mass spectrometry confirms the molecular identity of each batch against its expected mass.
Reverse-phase HPLC measures purity, reported as a percentage on the certificate.
The certificate is tied to the lot number and linked from the product page and your invoice.
The chromatogram shows one dominant peak at the expected retention time. The purity figure is the area of that peak as a share of the total — the higher, the cleaner the material.