Used as a biocide in industrial water systems to control microbial growth, particularly in cooling towers and paper mill systems. Effective against bacteria, algae, and fungi due to its surfactant properties that disrupt cell membranes. Commonly included in disinfectants and sanitizers for hard surfaces in healthcare and food processing environments. Also functions as a phase transfer catalyst in organic synthesis. Its long alkyl chain enhances lipid membrane penetration, making it suitable for preservative applications in cosmetics and personal care products.