Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of antitumor and antimicrobial agents. It serves as a building block for benzothiazole-based compounds, which show biological activity in medicinal chemistry. Also employed in the preparation of dyes and fluorescent materials due to the inherent electronic properties of the benzothiazole core. Its ester functionality allows for further chemical modifications, making it valuable in organic synthesis and drug discovery research.