Used primarily as an intermediate in the synthesis of various pharmaceuticals and agrochemicals. It plays a key role in the production of sulfonamide-based drugs, which are widely used as antibiotics, diuretics, and anti-diabetic agents. Additionally, it is utilized in the development of herbicides and fungicides, contributing to crop protection and agricultural productivity. Its reactive chlorosulfonyl group makes it valuable for introducing sulfonyl functionalities into organic molecules, enhancing their biological activity and efficacy.