Used as a key intermediate in the synthesis of high-performance dyes and pigments, particularly in the production of fiber-reactive dyes for textiles. Its sulfonyl chloride groups readily react with amines and alcohols, making it valuable in building complex chromophores. It also serves in the development of specialty polymers and photoactive materials due to its rigid aromatic structure and functional reactivity. Additionally, it finds use in research for creating sulfa-based compounds with potential biological activity.