Benzethonium chloride is a synthetic quaternary ammonium compound known for its antimicrobial and antiseptic properties. With the chemical formula C21H36ClN, it consists of a benzyl group, a phenolic moiety, and a quaternary nitrogen atom, contributing to its effectiveness as a disinfectant. Commonly used in both pharmaceutical and personal care products, benzethonium chloride is valued for its ability to inhibit the growth of bacteria, fungi, and viruses. Its applications range from skin antiseptics and hand sanitizers to preservatives in various formulations, reflecting its importance in enhancing hygiene and safety in healthcare and consumer products.