How do I verify the Certificate of Analysis for a Peptiko vial?

Every batch we ship is published at peptiko.xyz/coa-lookup, indexed by batch ID in the format PK-YYMM-NNNN. Find the batch ID printed on the vial label, open the COA lookup page, enter the batch ID, and the full PDF — with HPLC chromatogram, mass-spec data, water content (Karl Fischer) and endotoxin (LAL) results — is downloadable on that page. If your batch does not appear in the lookup, the vial is not from us; send a photo of the label and we will investigate.