Hydrogenated Castor Oil/Sebacic Acid Copolymer Bon Émollient No known benefits Hydrogenated Castor Oil/Sebacic Acid Copolymer at a glance Is both synthetic and plant-derived Chemically, it’s an oligo ester, or short polymer Used in hair care products to smooth the cuticle layer Excellent cling to skin and hair helps prevent moisture loss Hydrogenated Castor Oil/Sebacic Acid Copolymer description Hydrogenated castor oil/sebacic acid copolymer is made by a chemical reaction between hydrogenated (semi-solid) castor oil with sebacic acid, a carboxylic acid sometimes used as a pH adjuster in skin care products. The resulting ingredient has long-lasting emollient and smoothing properties that benefit skin and hair. The unique structural properties of this ingredient allow it to fill in the spaces where skin and hair are damaged, creating a perceptibly smoother feel. It’s an example of polymer technology that combines a natural and synthetic ingredient to create a new compound. Hydrogenated castor oil/sebacic acid copolymer is used in amounts between 0.5-2% in leave-on products and up to 5% in rinse-off hair care products designed for intensive repair. The safety of hydrogenated castor oil has been established and while an individual safety assessment of sebacic acid hasn’t been done, it is not believed to be a problem as used in cosmetics. Related ingredients: Polymer Sebacic Acid