Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceuticals and agrochemicals. Its structure supports the development of heterocyclic systems with potential antimicrobial, anti-inflammatory, or insecticidal properties. Commonly employed in research settings for constructing fused isothiazole derivatives that show promise in drug discovery programs. Also utilized in the preparation of fluorescent probes and dyes due to its electron-withdrawing nitro group and stable sulfonamide moiety, enabling applications in bioimaging and molecular labeling.