Peptide COA Library: UK

We publish a certificate against its batch number when a report is on file, so it can be matched to the listed product and batch. A batch still awaiting a public document is marked On request rather than being represented by another batch's result.

High-performance liquid chromatography separates a sample into its components and measures each as a proportion of the total. The purity percentage is the area of the target peptide peak as a share of all peaks detected. It describes a single-compound product only. A blend has no single purity figure, so its certificate quantifies each active by mass instead.

Published reports in the current library are issued by Janoshik Analytical, a third-party laboratory outside our sourcing chain. We publish each available report as received rather than replacing it with a summary, so its laboratory, methods, results and reference remain visible.

Because the figure only applies to a single-compound product. Purity is the proportion of a sample that is the target molecule, and a vial with two or more actives has no single target. A blend certificate quantifies each active by mass, which describes the vial accurately. A combined percentage on a blend does not describe anything real.

Where a report is on file, yes: open its batch row to read the published document before ordering. If a public document is not yet available, the row is marked On request.