Polyhexamethyleneguanidine hydrochloride is widely used as a disinfectant and antiseptic due to its strong antimicrobial properties. It is effective against a broad spectrum of microorganisms, including bacteria, viruses, and fungi, making it suitable for use in medical settings, water treatment, and hygiene products. In healthcare, it is applied for surface disinfection, sterilization of medical equipment, and as a component in wound care solutions. It is also utilized in the food industry to sanitize processing equipment and surfaces to prevent contamination. Additionally, it is incorporated into personal care products like hand sanitizers and wet wipes for its germ-killing capabilities. In water treatment, it helps control microbial growth in swimming pools, cooling towers, and industrial water systems. Its stability and effectiveness at low concentrations make it a preferred choice for various disinfection applications.