What is the reaction of Trichloroisocyanuric Acid with water?

Trichloroisocyanuric Acid (TCCA) is a highly effective disinfectant with good stability that would keep available chlorine content for years. It’s easy to use and does not need much manual intervention because of the application of floaters or feeders. Due to its high disinfection efficiency and safety, Trichloroisocyanuric Acid has been widely used in swimming pools, public toilets, and other places, with good results.

Reaction mechanism with water

When Trichloroisocyanuric Acid (TCCA) encounters water, it dissolves and hydrolyzes. Hydrolysis means the molecules gradually decompose into hypochlorous acid (HClO) and other compounds under the action of water molecules. The hydrolysis reaction equation is: TCCA + H2O→HOCl + CYA- + H+, where TCCA is trichloroisocyanuric acid, HOCl is hypochlorous acid, and CYA- is cyanate. This reaction process is relatively slow and usually takes several minutes to several hours to complete. The hypochlorous acid produced by the decomposition of TCCA in water has strong oxidizing properties and can destroy the cell membranes of bacteria and viruses, thereby killing them. In addition, hypochlorous acid can break down organic matter in water and therefore will reduce turbidity in water and make water clean and clear.

Application scenarios

TCCA is mainly used for disinfection of swimming pools, spas, and other water bodies. After adding TCCA, the number of bacteria and viruses in the pool water will be quickly reduced, thus ensuring the safety of water quality. In addition, TCCA can also be used for disinfection and sterilization in toilets, sewers, and other places. In these environments, TCCA effectively kills odor-causing bacteria and inhibits the spread of pathogens.

More cost-effective

The price of Trichloroisocyanuric Acid (TCCA) is relatively high, partly because of its high available chlorine content. Because of its highly effective and rapid sterilization effect, the overall cost-benefit ratio of TCCA remains high and effectively works in swimming pools and spas around the world.


Although TCCA has a good disinfection effect, users should pay attention to proper application. TCCA reacts with acids to produce toxic chlorine gas. When using TCCA, ensure that the environment is well-ventilated and never mix TCCA with any other chemicals. Used TCCA containers should be safely disposed of by relevant regulations to avoid environmental pollution.

Trichloroisocyanuric Acid (TCCA) excels in pool and spa water disinfection, rapidly killing bacteria and viruses to ensure safe water quality. When using TCCA, it is important to understand its disinfection mechanism and the precautions to be taken.


Post time: Apr-17-2024