Chlorine dioxide - ClO₂ is one of the more selective oxidants. It occurs in liquid form as an aqueous solution with a concentration of 2 ÷ 4 g ClO₂/l. It can be produced directly on site in the method chlorite – chlorine gas or chlorite – hydrochloric acid as well as dissolved from a stabilized form. Compared to classic disinfectants, chlorine dioxide is characterized by high disinfection efficiency, action in a wide pH range, lack of reactivity with ammonia, no formation of THM. In addition, water disinfection with chlorine dioxide requires a shorter contact time (three times shorter than chlorine) and longer stability and operation, which is particularly important, for example, in extensive, developed water supply networks. Additionally, this agent does not significantly deteriorate the organoleptic properties of disinfected water.

Chlorine Dioxide It is especially recommended for disinfecting surface waters, where humic substances are present. It is also used to prevent the development of legionella, fleas, disinfect cold stores and fungi.