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Tagged: microbial-testing, preservatives
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Microbial/Preservative testing in cosmetics
Posted by Herbnerd on May 26, 2022 at 12:18 amI 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)?
Bill_Toge replied 2 years, 5 months ago 4 Members · 12 Replies -
12 Replies
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Suggest at minimum you use CTFA method. In any case, preserve for complete elimination in 7 days or less, not the %’s.
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PhilGeis said:%
Currently i am using
185ppm formaldehyde as (formalin)0.45ppm CMI MI0.1%EDTApH 5.1 in cleansing products.My question was if the ratio of surfactants is 4/1/1 anionic/amphoteric/non-ionic, if total surfactant is 6%, we need to test for mold too. At what percentage of total surfactant at this ratio we don’t need to bother with mold?
Package is flip top cap.
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I’ve no specified number. My experience has been in shampoos and hand wash.
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ISO 11930 is the most rigorous method that’s generally recognised
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