Widely used as an intermediate in the synthesis of agrochemicals and pharmaceuticals, this compound plays a key role in the preparation of sulfonamide derivatives. Its reactive sulfonyl chloride group allows for easy coupling with amines, making it valuable in the development of herbicides and plant growth regulators. It is also employed in the manufacture of dyes and functional materials where chlorinated aromatic scaffolds are required. Due to its specificity and reactivity, it is preferred in multi-step organic syntheses where selective functionalization is needed.