Used as a coupling agent in hybrid organic-inorganic materials, this compound enables strong interfacial bonding between organic polymers and inorganic surfaces such as glass, metals, and silica. Its primary application is in coatings, adhesives, and composites where improved adhesion, durability, and moisture resistance are required. The trialkoxysilyl group hydrolyzes to form silanol bonds with inorganic substrates, while the cyclic anhydride group reacts with nucleophiles like amines or hydroxyls in organic resins, creating covalent linkages. This dual reactivity makes it valuable in primer formulations, surface modification of fillers for reinforced plastics, and in sol-gel processes to enhance mechanical and thermal stability of the final product.