Used as an intermediate in the synthesis of organophosphorus compounds, particularly in the preparation of bioactive molecules and pharmaceuticals. Its reactivity allows for the introduction of phosphonate groups into larger structures, which can be further modified to create enzyme inhibitors or prodrugs. Commonly employed in medicinal chemistry for developing compounds with potential antiviral or anticancer activity. Also utilized in agrochemical research for designing novel pesticides due to the stability and tunability of phosphonate derivatives.