... treatment system, swimming pools 1,3-Dibromo-5,5-dimethylhydantoin [Product Name]:1,3-Dibromo-5,5-dimethylhylhydantoin [ ... dissolve 2.2g1 of 1,3-Dibromo-5,5-dimethylhylhydantoin, pH-value of 0.1% water solution is 2.6. ... with plastic bag. net weight 25kgs or 40kgs. [Quality Index] ItemQuality IndexAppearancewhite crystal powderAssay98.0Dyring Loss %≤ 0.5Effective bromine %≥ 54.8ConclusionQualified 1,3 ...