Widely used as an intermediate in the synthesis of sulfa drugs, particularly in the production of antimicrobial and antifungal agents. It plays a key role in the preparation of sulfonamide-based pharmaceuticals due to its reactivity with amines. Also employed in agrochemical manufacturing for developing herbicides and plant growth regulators. Its chlorinated aromatic structure makes it valuable in organic synthesis for introducing sulfonyl functional groups. Additionally, it serves in research settings for modifying biomolecules and developing novel bioactive compounds.