Used as a key intermediate in the synthesis of organophosphorus compounds, particularly in the development of pharmaceuticals and agrochemicals. Its phosphoryl group enables participation in Horner-Wadsworth-Emmons reactions, facilitating the formation of carbon-carbon double bonds in fine chemical synthesis. Commonly employed in the preparation of biologically active molecules, including antiviral and anticancer agents, due to its ability to mimic phosphate esters in metabolic pathways. Also utilized in the design of novel ligands for catalysis and in the production of flame retardants as a reactive monomer.