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 healthcare settings, water treatment, and surface disinfection. In the medical field, it is applied in wound care products to prevent infections and promote healing. Additionally, it is utilized in the preservation of industrial materials, such as paints and coatings, to inhibit microbial growth. Its stability and low toxicity profile also make it a preferred choice for personal care products like hand sanitizers and disinfectant wipes.