Used primarily as a reactive intermediate in organic synthesis, especially in the production of epoxy resins and polymers. It serves as a crosslinking agent for polymers containing functional groups like amines or carboxylic acids, enhancing thermal and chemical resistance of the final material. Also employed in the synthesis of pharmaceuticals and agrochemicals due to its ability to introduce functionalized side chains. Its high reactivity requires careful handling, but it is valuable in creating specialty chemicals where strong bonding or modified molecular structures are needed.