This is from the link below:

Particular examples of organic bleaching agents include the dry, particulate heterocyclic N-bromo and N-chloro imides such as trichlorocyanuric, tribromocyanuric acid, dibromo- and dichlorocyanuric acid, the salts thereof with water-solubilizing cations such as potassium and sodium and mixtures thereof. Particular compounds are potassium dichloroisocyanurate and trichloroisocyanuric acids.