CAS: 122-99-6, 1117-86-8, 110-44-1 INCI: Phenoxyethanol (and) Caprylyl Glycol (and) Sorbic Acid Optiphen Plus is a broad-spectrum preservative that was developed as an alternative to parabens and formaldehyde for cosmetic formulations. Broad spectrum preservatives blend both preservatives and chelators to offer the fullest possible coverage for your product. Optiphen Plus contains Phenoxyethanol, Sorbic Acid, and Capryl Glycol. Phenoxyethanol is an ether alcohol used to preserve personal care products, while Sorbic Acid helps to lower pH and functions as a complementary preservative. Caprylyl Glycol is an emollient base, giving the final formula an exceptional feel.