Used primarily in the production of high-performance polymers, particularly polyethersulfones (PES), which are known for their excellent thermal stability, chemical resistance, and mechanical properties. These polymers are widely applied in industries such as automotive, aerospace, and electronics, where durable and heat-resistant materials are essential. Additionally, it serves as a key intermediate in the synthesis of specialty chemicals, including dyes and pigments, due to its ability to form stable and complex structures. In the field of membrane technology, it contributes to the development of ultrafiltration and reverse osmosis membranes, which are critical for water purification and desalination processes. Its role in enhancing material performance makes it valuable in advanced engineering applications.