TCCA (chemical formula: C₃Cl₃N₃O₃) is a strong chlorinating agent and disinfectant, commonly found as white crystalline powder or granules. It has good stability and a high effective chlorine content (≥90%). When dissolved in water, it slowly releases hypochlorous acid, and has bactericidal, bleaching, and algae-removing effects.

Sodium dichloroisocyanurate is widely used in the field of water treatment. Its strong oxidizing ability and efficient bactericidal ability make it a key agent in industrial circulating water, swimming pool water, drinking water, and large-scale wastewater treatment. It can effectively control microbial growth, prevent algae growth, and improve water quality.