Used as a key intermediate in organic synthesis, particularly in the preparation of thiophene-based compounds for pharmaceuticals and agrochemicals. It serves as a sulfination agent in the development of sulfur-containing heterocycles, which are important in drug discovery due to their biological activity. Also employed in material science for synthesizing conductive polymers and organic semiconductors, where thiophene derivatives enhance electronic properties. Its reactivity allows for selective functionalization in cross-coupling reactions, making it valuable in building complex molecules under mild conditions.