Does anyone have a good resource for specific antimicrobial activities of individual preservatives, mainly organic acids and non-traditional preservative? I’m trying to make my own broad spectrum (or close to broad spectrum) preservative combination, but I’m having a tough time finding what preservatives are affective against what microbes (gram pos, neg, yeast, mold, etc.). I know I will eventually have to challenge test, but it would be nice to start with a theoretical broad spectrum combo first.
I’m currently looking at dehydroacetic acid, dechlorobenzyl alcohol, caprylyl glycol, glyceryl caprylate, chlorphenesin, hexamidine diisethionate, phenethyl alcohol, etc.
Parameters: mainly lotions, ph 4-5, sensitive skin, hypoallergenic, non-Parabens, non-Formaldehyde Donors, non-Isothiazolinones, will add EDTA, glycerin, antioxidant if need be
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