How to verify a Janoshik Certificate of Analysis

Every Peptiko batch ships with an independent Certificate of Analysis. This guide explains how to confirm that COA is genuine, matches your vial, and reflects real third-party testing by Janoshik Analytical.

Find your lot number

Each vial is labelled with a unique lot number. Note it before you open or handle the vial — the lot number is the key that ties your specific vial to its Certificate of Analysis and to the underlying laboratory data.

Look it up in COA Lookup

Enter the lot number in COA Lookup at peptiko.xyz/coa-lookup. The matching Certificate of Analysis loads with the HPLC chromatogram and mass-spectrometry results recorded by the testing laboratory. If a lot number returns no record, the vial did not come from us.

Check what a real COA shows

A genuine third-party COA names the testing lab (here, Janoshik Analytical), states the method (HPLC for purity, mass spectrometry for identity), reports the measured purity as an area percentage, and matches the lot number printed on your vial. Anonymous "98%+" claims with no lab named and no lot-level report are not verification.

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