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Microbial/Preservative testing in cosmetics
I haven’t been able to find the answer, it may be I’m looking in the wrong place or incorrect search terms.
When conducting preservative efficacy tests, is there a particular standard you follow?
For some historical reason we have been using the British Pharmacopoeia PET test protocols - but since we are manufacturing cosmetic do we need to conduct PET to a specific pharmacopoeia (ie BP or USP)?