Used as a reactive intermediate in organic synthesis, particularly in the production of lubricant additives. It functions as a building block for creating polymeric dispersants that improve the performance of engine oils by preventing sludge and deposit formation. Also employed in synthesizing corrosion inhibitors and fuel additives due to its ability to modify surface properties. Its anhydride group readily reacts with amines and alcohols, making it valuable in curable resin systems and coatings for enhanced adhesion and durability.