Used primarily as a reagent in organic synthesis, particularly in the preparation of phosphonate-based compounds for pharmaceuticals and agrochemicals. It serves as a building block in the synthesis of vinylphosphonates, which are important in the development of enzyme inhibitors and bioactive molecules. Its reactivity allows for carbon-phosphorus bond formation, enabling the construction of complex molecular structures in medicinal chemistry research. Also employed in Horner-Wadsworth-Emmons reactions for olefination, offering an efficient route to unsaturated compounds with high stereoselectivity.