Used as a key intermediate in the synthesis of biologically active compounds, particularly in the development of pharmaceuticals. Its structure allows for functionalization at multiple sites, making it valuable in creating indole-based drug candidates. Commonly employed in the preparation of sulfonamide derivatives, which are explored for their antimicrobial, anti-inflammatory, and anticancer properties. Also utilized in agrochemical research for designing new pesticides and herbicides due to its electron-withdrawing nitro group and reactive sulfonyl chloride functionality.