Used primarily as an intermediate in organic synthesis, it plays a key role in the production of pharmaceuticals and agrochemicals. Its reactive sulfonyl chloride group enables it to form sulfonamides, which are crucial in developing various therapeutic agents, including antibiotics and anti-inflammatory drugs. Additionally, it is employed in the manufacture of dyes and pigments, where it acts as a building block for complex molecules. Its application extends to polymer chemistry, where it is utilized in modifying polymer properties to enhance performance in specific industrial applications.