Used as a key intermediate in organic synthesis, particularly in the preparation of fluorescent dyes and photoactive compounds. Its structure supports the development of sensors for detecting metal ions and biomolecules due to its ability to form stable complexes and exhibit strong fluorescence upon binding. Also employed in electrochemical applications, including the fabrication of biosensors and catalytic systems, where its redox-active benzothiazolium core enhances electron transfer efficiency. Additionally, it finds use in pharmaceutical research for designing novel antimicrobial and antitumor agents through derivatization at the carboxymethyl site.