Used as an intermediate in the synthesis of dyes, pharmaceuticals, agrochemicals including sulfonylurea herbicides, and artificial sweeteners. It serves in the preparation of sulfa drugs due to its sulfonamide functional group, which is key in antimicrobial activity. Also employed in the production of saccharin, where it acts as a precursor in chlorination and amidation reactions. Its chloro-substituent allows for further functionalization in organic synthesis, making it valuable in developing complex molecules.