Used as a flame retardant additive in polymers and resins due to its ability to promote char formation and reduce flammability. It is particularly effective in epoxy systems, where it enhances thermal stability and fire resistance without compromising mechanical properties. Its phosphorus content contributes to both condensed-phase and gas-phase flame inhibition mechanisms. Also investigated as a precursor in the synthesis of organophosphorus compounds for ligands in catalysis. Suitable for applications requiring halogen-free flame retardants, such as in electronics and construction materials.