Finally, a paraben and formaldehyde-free preservative! Optiphen is a unique liquid preservative formulation which consists of phenoxyethanol and an emollient base. For use in a variety of formulas such as aqueous, anhydrous and emulsion products. Optiphen is a clear liquid preservative that can be easily added directly to the formulation during pre- or post-emulsification, at or below 80°C. Recommended Use Levels: 0.5 - 1.5% Globally Approved. Contains a reliable agent, sorbic acid, for anti-fungal and anti-mold activity unlike Optiphen ND which contains benzoic acid which may be de-activated by non-ionic emulsifiers and surfactants, unlike regular Optiphen which contains no acid and no protection from mold, fungus or yeast Highly effective broad spectrum antimicrobial. Effective at pH levels below 6. Non-formaldehyde donor. Paraben-free. Non-isothiazolinone. Imparts emolliency. Compatible with most raw materials. Excellent safety and toxicological profile. Heat tolerant to 176F.