Phenostat is a blend of multifunctional ingredients that allows formulators to use hurdle technology to create paraben-free formulations. As opposed to traditional methods of preservation, hurdle technology is a formulation approach whereby combinations of ingredients and other aspects of formulation are used along with good manufacturing principles. Phenostat includes phenoxyethanol, an aromatic alcohol that also has antimicrobial properties, caprylhydroxamic acid (CHA), a chelating agent, and methylpropanediol.