Octadecylamine hydrochloride is widely used as a cationic surfactant in various industrial applications. It is particularly effective in the formulation of corrosion inhibitors for metal surfaces, especially in oil and gas pipelines, where it forms a protective layer to prevent rust and degradation. In the textile industry, it serves as a softening agent and antistatic agent, enhancing the feel and quality of fabrics. Additionally, it is utilized in the production of asphalt emulsions, improving adhesion and stability. In the field of agriculture, it acts as an emulsifier and dispersant in pesticide formulations, ensuring even distribution and effectiveness. Its antimicrobial properties also make it suitable for use in certain disinfectants and sanitizers.