Used as a key reagent in organic synthesis, particularly as a source of phenylthio radicals and in the construction of sulfur-containing heterocycles. It serves as a phenylthiolating agent in the preparation of sulfides and thiophenols, which are important intermediates in pharmaceuticals and agrochemicals. Also employed in radical reactions to introduce the phenylthio group into organic molecules, enabling further functionalization in synthetic pathways. Its stability and reactivity make it valuable in the development of new synthetic methodologies, especially in medicinal chemistry for modifying bioactive compounds.