This chemical is primarily used as a key intermediate in the synthesis of high-performance polymers, particularly polyethersulfones (PES). These polymers are valued for their thermal stability, chemical resistance, and mechanical strength, making them suitable for applications in aerospace, automotive, and electronics industries. Additionally, it serves as a precursor in the production of dyes and pigments, where its sulfonic acid groups enhance solubility and stability. In water treatment processes, it is utilized for its ion-exchange properties, aiding in the removal of contaminants. Its role in the development of advanced materials and functional chemicals underscores its importance in industrial and environmental applications.