There are many occasions when polyurethane foams need to be flame retardant, for both technical and legislated reasons. One of the most effective methods of flame-retarding polyurethane foams is to incorporate halogenated compounds into the molecular composition. Traditionally, most flame retardants, although efficient in their function of retarding open-flame combustion in a polyurethane foam, promote smolder, thermal degradation (scorch), and hydrolysis. It is essential that one or more of these tendencies be minimized in certain foam types or in certain application areas. TCPP (tris (1-chloro-2-propyl) phosphate) is a generally flame retardant used in rigid foams in consumer products and in home insulation.