Polyhexamethyleneguanidine hydrochloride is widely used as a disinfectant and antimicrobial agent due to its potent activity against a broad spectrum of microorganisms, including bacteria, viruses, and fungi. It is commonly applied in water treatment systems to control microbial growth and maintain hygiene in industrial and recreational water facilities. In the healthcare sector, it is utilized for surface disinfection in hospitals and clinics to prevent the spread of infections. Additionally, it is incorporated into cleaning products for household and industrial use, ensuring effective sanitation. Its application extends to the preservation of materials, such as textiles and wood, where it inhibits microbial degradation. The chemical is also employed in agriculture as a biocide to protect crops from pathogens, enhancing yield and quality. Its stability and efficiency make it a valuable component in various antimicrobial formulations.