How our products are tested
Certificates of analysis from independent laboratories, which we do not own or operate, are published on this page exactly as each laboratory issued them.
The purity figure comes from high-performance liquid chromatography (HPLC): it shows how much of the sample is the target compound. We do not stock material below 99% chromatographic purity.
Certificates of Analysis
Each certificate opens as the laboratory’s own PDF, with its purity result shown in the table above. Questions about any report are welcome through our contact page.