Optipehn is a patent-pending liquid preservative from ISP/Sutton which offers broad spectrum preservation without parabens or formaldehyde. This preservative functions particularly well in slightly acidic formulations, and is globally approved. Consisting of Phenoxyethanol (an aromatic ether alcohol), Sorbic Acid (a natural product that offers protection from yeast, fungus and mold) and Caprylyl Glycol (an emollient base). 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.