Tricresyl phosphate, abbreviated TCP, is an organophosphate compound. It is a derived from cresol and phosphoric acid. This viscous liquid is colourless when pure, but commercial samples are typically yellow. It is nonflammable and virtually insoluble in water. Commercial tricresyl phosphate is a mixture of ortho, meta, and para-cresyl phosphates.

Tricresyl phosphate, abbreviated TCP, is an organophosphate compound. It is a derived from cresol and phosphoric acid. This viscous liquid is colourless when pure, but commercial samples are typically yellow. It is nonflammable and virtually insoluble in water. Commercial tricresyl phosphate is a mixture of ortho, meta, and para-cresyl phosphates.

A flame retardant polyurethane composition comprising: an (alkyl substituted) triaryl phosphate ester; a phosphorus-containing flame retardant having at least about 5 wt. % phosphorus and comprising at least one of a monomeric phosphorus- containing compound, a dimeric phosphorus-containing compound or a mixture thereof; and a flexible polyurethane foam reaction mixture including at least one polyol and at least one isocyanate.

The flame retardant composition of Claim 1 wherein each of R1, R2, R3, R4 and R5 is independently a non-halogenated or halogenated alkyl group of from 1 to about 10 carbon atoms, a non-halogenated or halogenated aryl group of from 6 to about 20 carbon atoms or a non- halogenated or halogenated alkyl-substituted aryl group of from 6 to about 20 carbon atoms, and R5 is a non-halogenated or halogenated alkylene group of from 2 to about 20 carbon atoms or a non-halogenated or halogenated unsubstituted or lower alkyl-substituted arylene group of from 6 to about 20 carbon atoms.