Used as a flame retardant additive in polymers and resins, particularly in polyurethane foams and epoxy systems. Its phosphonate structure contributes to both thermal stability and char formation during combustion, reducing flammability. Also functions as an intermediate in the synthesis of bioactive molecules due to its phosphorus-containing scaffold, showing potential in medicinal chemistry for enzyme inhibition. Additionally, applied in corrosion protection coatings where it enhances adhesion and durability of protective films on metal surfaces.