Guide
How to Read a Certificate of Analysis
A field guide to interpreting the COA that ships with every product.
What is a COA?
A Certificate of Analysis (COA) is a document issued by an accredited laboratory that confirms the identity, purity, and composition of a product batch.
Key sections
- Identity test — confirms the compound matches its label
- Purity (HPLC) — percentage of the target compound vs impurities
- Appearance — visual description matching the specification
- Batch number — links the COA to a specific production lot
For research use only — not for human or veterinary consumption.