Pka of benzoic acid in presence of surfactants
For those who want to use sodium benzoate as preservative for there cleansing product, here is a data that shows the pka of benzoic acid in presence of some surfactants. Hope it is useful for you.
According to this, in shampoo with 11%% ammonium lauryl sulfate+2% CAPB at pH 4, would sodium benzoate with 0.2% EDTA be enough as preservative? If yes, at what percentage?
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