Common name for sodium dichloro-s-triazinetrione or the new term sodium dichloroisocyanurate. A fast-dissolving chlorine compound containing sodium, chlorine and cyanuric acid (stabilizer or conditioner). It has a neutral pH (pH 6.8) and is quick dissolving so it can be used for regular chlorination or superchlorination. Two types are sold. The anhydrous version that provides 62 percent available chlorine and is more dangerous to store and handle, and the dihydrate (Leslie's Chlor Brite®) which has 56 percent available chlorine and is much safer to store and handle.

The common name for Sodium Dichloro Isocyanuric Acid. A quick dissolving chlorine compound made up of chlorine and cyanuric acid (stabiliser) and has a pH of 6.9 . Shock treatment with dichlor is not recommended as it may result in overstabilisation and chlorine lock. If dichlor is used, a monthly check of the cyanuric acid level is recommended, to prevent overstabilisation and chlorine lock.