Tricresyl phosphate (TCP) is used as a solvent for nitrocellulose esters and numerous natural resins. It is a plasticizer for chlorinated rubber, vinyl plastics, polystyrene and polyacrylic and polymethacrylic esters. Tricresyl phosphate also acts as a binder for resins and nitrocellulose to improve toughness, elasticity and polishing properties of coatings. Alone or associated with hydrocarbons, it is used as an antiwear and antifriction additive in numerous synthetic lubricants, incorrectly termed “oils” by reason of their appearance. It is also employed as a hydraulic fluid. When incorporated in gasoline, tricresyl phosphate counteracts the harmful effects of lead deposits. In addition, it is an excellent fire retardant in many industries.
