TCCA is the abbreviation of Trichloroisocyanuric Acid, is known as Symclosene, trichloro-s-triazinetrione, TCICA, and trichlor, is a chemical compound used as an industrial disinfectant, bleaching agent and a reagent in organic synthesis. This white crystalline powder, which has a strong "chlorine odour," is sometimes sold in tablet or granule form for domestic and industrial use.