What is "tricresyl phosphate"

n. (context chemistry English) An organophosphate compound derived from cresol and phosphoric acid, chemical formula C₂₁H₂₁O₄P, used as a plasticizer, flame retardant, waterproofer, etc.

Tricresyl phosphate, abbreviated TCP, is an organophosphate compound that is used as a plasticizer and diverse other applications. It is a colourless, viscous liquid, although commercial samples are typically yellow. It is virtually insoluble in water.