Used as an intermediate in the synthesis of organophosphorus compounds, particularly in the development of ligands for catalytic reactions. It serves in the preparation of flame retardants due to the presence of chlorine and phosphorus, which contribute to fire-resistant properties in polymers. Also employed in the manufacture of specialty chemicals for agrochemical and pharmaceutical applications where phosphine oxide derivatives act as key building blocks. Its stability and reactivity make it suitable for use in palladium-catalyzed coupling reactions and other transformation processes in fine chemical synthesis.