Used primarily as an intermediate in the synthesis of pharmaceuticals and biologically active compounds. Its structure supports the development of heterocyclic systems found in certain drug candidates, particularly those targeting central nervous system disorders and inflammatory conditions. The carboxylic acid functionality allows for easy derivatization, enabling the formation of amides, esters, and other functional groups important in medicinal chemistry. It also serves in the preparation of fluorescent probes and dyes due to the inherent electronic properties of the benzo-fused isothiazole ring. Its application in agrochemicals is emerging, particularly in the design of novel pesticides with improved selectivity and environmental profiles.