... , swimming pools 1,3-Dibromo-5,5-dimethylhydantoin [Product Name]:1,3-Dibromo-5,5-dimethylhylhydantoin [Molecular Formula]: C5H6O2N2Br2 [Molecular Weight]: 285.94 [Properties]: white or light yellow powder ... , slightly soluble in water. At 20 1L of water can dissolve 2.2g1 of 1,3-Dibromo-5,5-dimethylhylhydantoin, pH ...