What Is a Certificate of Analysis (COA)?

A Certificate of Analysis, commonly known as a COA, is a document that provides analytical information about a specific product batch. Depending on the material and testing process, a COA may include information such as identity, purity, batch number, testing date and analytical methods.

Reviewing the available documentation allows researchers to understand the testing information associated with a particular batch. Methods such as HPLC and mass spectrometry may be used as part of analytical testing, depending on the compound and laboratory process.