Disinfectants are chemicals that are dosed in to systems, such as Cooling Towers, to destroy microorganisms. Disinfectant chemicals include: Glutaraldehyde Sodium Hypochlorite Calcium Hypochlorite Stabilised Liquid Bromine Chlorine Dioxide Hydrogen Peroxide Peracetic Acid Iodine Benzalkonium Chloride Polyaminopropyl Biguanide