Used as a key intermediate in the synthesis of fluorescent dyes and optical brighteners due to its benzothiazole core, which enhances light absorption and emission properties. Commonly employed in the development of sensors for metal ions, especially zinc and mercury, because the structure allows for chelation and signal transduction. Also found in agrochemical formulations as a building block for fungicides and plant growth regulators. Additionally, it serves in pharmaceutical research for designing bioactive molecules with antimicrobial and anti-inflammatory activities. Its hydroxyl group enables easy esterification or etherification, making it versatile for modifying drug solubility and stability.