For Research Purposes Only · Not For Human Consumption

Independent lab reports

Every batch is tested by an accredited external laboratory using HPLC-UV and mass spectrometry before dispatch.

Reading these reports

What is on a Certificate of Analysis

Each certificate above is the document the testing laboratory produced for that specific lot. We publish them unedited, as PDFs, so the figures can be checked against the vial you receive rather than taken on trust.

HPLC-UV purity

High-performance liquid chromatography separates the peptide from related impurities, and UV detection measures each fraction. The result is expressed as a percentage of total peak area — our floor is ≥98%. The chromatogram itself appears on the certificate, so you can see the peak shape rather than only the number derived from it.

Mass spectrometry identity

Purity says how clean the material is; it does not say what the material is. Mass spectrometry confirms that by matching the observed molecular weight against the published weight for the named peptide. A certificate without an identity test is incomplete, however good the purity figure looks.

Lot number and traceability

The lot number on the certificate should match the label on the vial and the reference on your invoice. If those three do not agree, the certificate is not for the material you are holding. This is the single most common way generic or recycled documentation gets passed off as batch-specific.

Who signed it, and why that matters

Our testing is carried out by an accredited independent laboratory — laboratories independent of us, so the result is not something we can influence. We do not test our own products. Full detail on the process, including the criteria that cause a lot to be rejected outright, is on the quality and testing page, and a worked walkthrough is in our guide to reading a CoA.

Certificates are published for compounds we test by HPLC and mass spectrometry. Bacteriostatic water is a reconstitution solvent rather than a peptide and so has no HPLC certificate; its specification is on its product page.