Used as an intermediate in the synthesis of heterocyclic compounds, particularly in the preparation of benzothiazoles and related structures which exhibit biological activity. Employed in medicinal chemistry for developing compounds with antimicrobial, anti-inflammatory, and antitumor properties. Also serves as a building block in dye synthesis and in the development of sulfonamide-based pharmaceuticals. Its structure allows for easy functionalization, making it valuable in combinatorial chemistry and drug discovery research.