Used as a key intermediate in the synthesis of flame retardants due to its ability to form stable phosphorus-based structures that enhance thermal resistance in polymers. Employed in epoxy resins and polycarbonates to improve fire safety without compromising mechanical strength. Also serves as a ligand in catalytic systems, particularly in metal-catalyzed reactions where phosphorus-oxygen coordination supports catalyst stability and selectivity. Its trifunctional phenolic structure allows cross-linking in resin formulations, contributing to high-performance coatings and adhesives with improved heat and chemical resistance.