5 Preparations and disinfectants for destroying bacteria, fungi, algae and microorganisms in cooling water (cooling towers, evaporative condensers, air washers, etc.) and treatment of wastewater; preparations for the pretreatment of cooling water (cooling towers, evaporative condensers, air washers, etc.) and wastewater for preventing bacterial, fungal, algal and microorganism contaminations; all included in class 5