DESC: Blue Wave s premium stabilized chlorine features U V protection to shield it from the sun and is manufactured using only the highest quality EPA-approved chlorine Blue Wave oversees a strict quality-controlled tabletting process which guarantees the optimum hardness of each tablet This keeps tablets from dissolving too rapidly and ensures proper chlorine dosages 24 hours a day You will find that Blue Wave chlorine dissolves completely with no residue It s the best you can buy Compare Blue Wave chlorine to brands like Pace Sun Guardex Leslie E-Z Chlor BioGuard Powerful 90 Available Chlorine Faster dissolving for more immediate results Great for use in floaters automatic chlorinators and skimmer baskets Each tab weights 0 5 oz 99 Trichloro-S-Triazinetrione MSDS Label///-Outdoor/Pool Products/Chemicals