Used as a disinfectant in water treatment systems, particularly in swimming pools and spas, where it serves as an effective alternative to chlorine. It controls bacteria, algae, and other microorganisms without producing strong odors or causing eye and skin irritation commonly associated with chlorine-based products. Also found in some cosmetic and personal care formulations as a preservative due to its antimicrobial properties. Additionally, it is used in contact lens solutions and wound care products for its broad-spectrum biocidal activity and compatibility with biological tissues.