1,3-Dichloro-5,5-dimethylhydantoin is an organic compound with the molecular formula C5H6Cl2N2O2. It belongs to the hydantoin family and is characterized by the presence of two chlorine atoms attached to a 5,5-dimethylhydantoin scaffold. This compound exhibits unique reactivity and finds application in various chemical reactions for the synthesis of pharmaceuticals, agrochemicals, and other important fine chemicals. Its halogen substituents provide opportunities for selective transformations, making 1,3-dichloro-5,5-dimethylhydantoin a valuable building block in organic chemistry.