Used as a crosslinking agent in the production of high-performance polymers, especially in heat-resistant and chemically resistant engineering plastics. It plays a key role in the synthesis of polysulfones and polyether sulfones by reacting with bisphenol compounds, enhancing thermal stability and mechanical strength.

Also employed in the development of specialty membranes for filtration and separation processes due to its ability to form rigid, durable polymer networks.

Its reactivity makes it valuable in creating custom resins for aerospace, electronics, and automotive applications where long-term performance under extreme conditions is required.