This European Standard is applicable to trichloroisocyanuric acid used directly or used to prepare commercial
formulations for disinfecting swimming pool water. It describes the characteristics of trichloroisocyanuric acid
and specifies the requirements and the corresponding test methods for trichloroisocyanuric acid. It gives
information on its use for treating swimming pool water and determines the rules relating to safe handling and
use (see Annex B).