Used as a key reagent in oligonucleotide synthesis, particularly in the preparation of phosphoramidite monomers for DNA and RNA assembly. It enables efficient coupling reactions by acting as a phosphitylating agent, facilitating the formation of phosphite triester linkages in solid-phase synthesis. Its selectivity and reactivity make it valuable in automated DNA synthesizers for producing high-purity genetic sequences used in research, diagnostics, and pharmaceutical development. Also employed in the synthesis of modified nucleic acids for antisense therapy and gene editing technologies.