How to Read a Certificate of Analysis (COA)

How to Read a Certificate of Analysis (COA)

A Certificate of Analysis summarizes the quality-control results associated with a specific product batch. Reviewing the document systematically helps confirm identity, specification compliance, and document traceability.

Core information to verify

Confirm the product name, catalog number, batch or lot number, test date, and stated specification. Each reported result should be read together with its analytical method and acceptance criterion.

Questions to ask

If a result, unit, test method, or approval field is unclear, request clarification before using the material in a regulated or critical workflow. Document requirements may vary by application and region.

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