Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of diuretic agents and other bioactive molecules. Its sulfonamide group enables it to participate in reactions that form carbon-sulfur or carbon-nitrogen bonds, making it valuable in medicinal chemistry. It is also employed in the preparation of agrochemicals and functionalized aromatic compounds where chlorinated aromatic rings enhance reactivity or stability. Its structure allows for selective derivatization, supporting research in drug design and optimization.