Octadecylamine is widely used as a corrosion inhibitor in industrial applications, particularly in oil and gas pipelines, to protect metal surfaces from rust and degradation. It forms a protective layer on the metal, preventing contact with corrosive substances. In the manufacturing sector, it serves as a surfactant and emulsifying agent, aiding in the stabilization of mixtures and improving the consistency of products like paints, coatings, and lubricants. Additionally, it is utilized in the production of quaternary ammonium compounds, which are essential in fabric softeners, disinfectants, and antimicrobial agents. In the agricultural industry, octadecylamine is employed as a component in pesticides and herbicides, enhancing their effectiveness in controlling pests and weeds. Its hydrophobic properties also make it suitable for use in water-repellent treatments for textiles and paper.