Used primarily as a key intermediate in the synthesis of high-performance polymers, such as polysulfones and polyethersulfones, which are valued for their thermal stability, chemical resistance, and mechanical strength. These polymers find applications in industries like aerospace, automotive, and electronics, where durable and heat-resistant materials are essential. Additionally, it is employed in the production of specialty chemicals, including flame retardants and coatings, due to its ability to introduce sulfonyl groups into organic molecules. Its role in creating advanced materials makes it significant in developing innovative solutions for demanding industrial applications.