Biguanide hydrochloride is widely used as a disinfectant and antiseptic, particularly in medical and dental settings, due to its strong antimicrobial properties. It is effective against a broad spectrum of bacteria, viruses, and fungi, making it a key component in hand sanitizers, surface cleaners, and wound care products. In healthcare, it is often applied to sterilize surgical instruments and disinfect hospital surfaces to prevent infections. Additionally, it is used in water treatment processes to eliminate harmful microorganisms. Its role in personal care products, such as mouthwashes and acne treatments, highlights its versatility in maintaining hygiene and preventing microbial growth.