How to Read a Certificate of Analysis (COA)
A certificate of analysis (COA) documents the analytical testing performed on a specific lot of research material. Understanding it helps laboratories confirm they received what they ordered.
Identity
Identity testing — typically by mass spectrometry — confirms the molecule matches the expected structure for the labeled compound.
Purity
Purity is most often reported as an HPLC percentage. A higher percentage indicates fewer related impurities in the lot.
Lot and date
Each COA is tied to a single lot number and test date, so you can match physical inventory back to its documentation.
All materials referenced here are sold for laboratory research use only (RUO).
All products are sold strictly for laboratory and research use only (RUO). Not for human or animal consumption. Not for therapeutic, diagnostic, or clinical use.