Used primarily as an intermediate in the synthesis of high-performance polymers, particularly polysulfones, which are valued for their thermal stability, toughness, and transparency. These polymers are widely applied in the production of medical devices, filtration membranes, and aerospace components. Additionally, it serves as a key raw material in the manufacture of specialty chemicals, including flame retardants and coatings, due to its ability to enhance thermal and chemical resistance. Its role in the development of advanced materials makes it significant in industries requiring durable and high-performance solutions.