A certificate of analysis (CoA) is a laboratory report for one specific batch. We publish it for the batches we have one for.
The packaging shows the production date (e.g. 09/26). Your package belongs to the certificate with the same production date — any other one covers different material.
Most often HPLC — liquid chromatography. It states how the purity was measured, not only what came out.
The result for this one batch. It is not the same as the purity declared in the catalogue for the product.
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A certificate documents the composition and purity of the given material, nothing more. It is not an authorisation for use in humans or animals and implies no claim about effects. All goods are intended exclusively for laboratory and research purposes.