Optiphen 200 preservative should be used in cosmetic products at concentrations in the range 0.75 % to
1.3 %. For the preservation of simple surfactant-products dosages of 0.5 % might be sufficient.
this information is about usage rate.
Optiphen 200 is 74% phenoxyethanol and 26% caprylyl Glycol.
what is a simple surfactant product?
is shampoo a simple surfactant product?