A Certificate of Analysis is a third-party laboratory document that records the identity, purity, and storage specifications of a specific production batch of a compound.
A COA is the paper trail behind a purity claim. It identifies the lot, the analytical methods used (typically HPLC and mass spectrometry), the integrated purity result, and the storage and handling conditions assumed in testing.
For a buyer, the COA is what makes a purity figure defensible in a methods section, a grant audit, a journal review, or a state board inspection.
A COA is issued for every batch we ship, downloadable from the buyer's account dashboard and QR-linked on the vial label. The COA is per lot — not per product — because purity is a measurement, and measurements happen to specific lots, not catalog entries.