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Good Manufacturing Practices Q&A

  •   What is the best way to authenticate a suppliers Certificate of Analysis (COA)? What should I expect back from my supplier that will be acceptable?

    Answered September 1st, 2010 by Expert: Mollie Kober

    Really, the only way to authenticate a supplier’s COA is to perform the tests listed on the COA and compare results. This is something that you would need to do—not the supplier, as the supplier has already provided you with the COA. If you do not have an in-house laboratory capable of performing this testing, then you can send a sample to an outside lab. The lab should provide you with a test report indicating the results and test method used.

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