available chlorine) Anionic Surfactant/0-4% The most satisfactory container for this product is a fiber drum, with a 4 mil polyethylene bag liner. Formula No. Sodium dichloroisocyanurate/27% (equivalent to 18% trichloroisocyanuric acid) Sodium tripolyphosphate/20-40% Sodium sulfate or sodium chloride/Balance Sodium tripolyphosphate/20-30% Sodium sulfate/Balance Sodium dichloroisocyanurate*/16 to 25% (to provide 10 to 15% Trichloroisocyanuric acid/18% *Chlorine resistant masking agents may be used to mask the chlorine odor Sodium tripolyphosphate/20-40% Anhydrous sodium metasilicate/5% Chlorine stable optical brightener/0.1-0.2% Sodium Sulfate or sodium chloride/Balance if desired.