... 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 ... dissolve 2.2g1 of 1,3-Dibromo-5,5-dimethylhylhydantoin, pH-value of 0.1% water solution is ...