Used as an intermediate in the synthesis of fluorescent dyes and optical brighteners due to its heterocyclic structure with sulfur and nitrogen atoms. Its derivatives show activity in UV-absorption and are applied in coatings and polymers to enhance light stability. Also investigated for use in pharmaceuticals, particularly in the development of compounds with anti-inflammatory and antimicrobial properties. Employed in research for sensor materials because of its ability to chelate metal ions, making it useful in detecting heavy metals in environmental samples.