Used in organic synthesis as a dienophile in Diels-Alder reactions to form cyclic compounds. Its rigid structure and electron-deficient double bond make it effective for constructing six-membered rings with high regio- and stereoselectivity. Also employed in the development of specialty polymers and resins, where it contributes to thermal stability and cross-linking. Additionally, it serves as a building block in the preparation of pharmaceuticals and agrochemicals, particularly in routes requiring fused ring systems. Its anhydride functionality allows for easy conversion to imides or diacids, expanding its utility in material science and drug design.