Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceuticals and agrochemicals. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for introducing the benzo[d]thiazole moiety into larger molecules. Commonly employed in the development of fluorescent dyes and sensors due to the inherent fluorescence of the benzothiazole core. Also utilized in material science for creating specialty polymers with enhanced thermal and electronic properties.