Used primarily in organic synthesis as a reagent for introducing phosphorus-containing groups into molecules. It is particularly valuable in the preparation of phosphoramidites, which are key intermediates in the synthesis of oligonucleotides for DNA and RNA sequencing. Additionally, it serves as a precursor in the production of flame retardants and ligands for coordination chemistry. Its reactivity with various organic compounds makes it a versatile tool in the development of pharmaceuticals and agrochemicals.