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Phenoxyethanol and ethoxylated surfactants
I keep finding reference to the fact that Phenoxyethanol can be lose its effectiveness if there is a large percentage of ethoxylated surfactants present in a formula. I can’t seem to find information on what is considered a “large”amount. I want to use 5% Peg 6 in a micellar cleansing water and wish to use Optiphen Plus as the preservative.
My question is …will a formula with 3-5% ethoxylated ingredients (PEGS/Polysorbates) be effectively preserved with Optiphen Plus?Thank you
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