Used as a reagent and intermediate in organic synthesis, particularly in the preparation of phosphorus-containing compounds. It serves as a catalyst modifier or ligand in certain transition metal-catalyzed reactions, enhancing selectivity and stability. Also employed in the synthesis of pharmaceuticals and fine chemicals due to its ability to participate in sulfur-transfer reactions. Its solid, stable nature makes it suitable for use in moisture-sensitive processes and as a precursor in the preparation of other organophosphorus reagents.