1,3-Dibromo-5,5-dimethylhydantoin cas:77-48-5 purity:98% used in water treatment system, swimming pools 1,3-Dibromo-5,5-dimethylhydantoin [Product Name]:1,3-Dibromo-5,5-dimethylhylhydantoin [ ... . net weight 25kgs or 40kgs. [Quality Index] ItemQuality IndexAppearancewhite crystal powderAssay98.0Dyring Loss %≤ 0.5Effective bromine %≥ 54.8ConclusionQualified 1,3-Dibromo-5,5-dimethylhydantoin 98%