Octadecenylsuccinic anhydride is widely used as a sizing agent in the paper manufacturing industry. It enhances the water resistance and strength of paper by reacting with cellulose fibers, making it ideal for producing high-quality paper products. In the coatings and adhesives sector, it acts as a key intermediate for synthesizing resins that improve adhesion, durability, and flexibility. Additionally, it is employed in the production of surfactants and emulsifiers, which are essential in various industrial and consumer products. Its ability to modify surface properties also makes it valuable in the formulation of lubricants and corrosion inhibitors.