Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its reactive chlorine and heterocyclic structure make it valuable for constructing bioactive molecules. Commonly employed in the development of fungicides and antimicrobial agents due to the inherent activity of the benzisothiazole core. Also utilized in the preparation of specialty polymers and additives where thermal and chemical stability are required. Its high purity (99%) ensures consistent performance in sensitive reactions and industrial processes.