Used primarily as a key intermediate in the production of high-performance polymers, particularly polyether sulfones (PES) and polysulfones. These polymers are valued for their thermal stability, chemical resistance, and mechanical strength, making them suitable for applications in automotive, aerospace, and electronics industries. It is also employed in the synthesis of flame retardants and as a modifier in epoxy resins to enhance their properties. Additionally, it finds use in the manufacturing of specialty coatings and adhesives, where durability and resistance to harsh environments are critical.