Chlorphenesin Bon Conservateur No known benefits Chlorphenesin at a glance Preservative that inhibits contamination in skin care formulas Extends a product’s shelf life Helps prevent unwanted odor Used in combination with other preservatives Chlorphenesin description As a skin care ingredient, chlorphenesin is used as a water- and glycerin-soluble preservative to inhibit contamination. Since it’s considered weak against some types of bacteria, it’s always combined with other preservatives, such as phenoxyethanol and caprylyl glycol, to boost stability and increase the product’s shelf life. It is also considered a “cosmetic biocide” to help prevent unwanted odors on skin. In 2014, the Cosmetic Ingredient Review Expert Panel concluded chlorphenesin was safe for skin (their report surveyed on-market formulas with concentrations up to 0.32% in rinse-off products and 0.3% in leave-on products). Related ingredients: Phenoxyethanol Caprylyl Glycol