1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione;1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione; Dactin; Daktin; Dantochlor RW; Dantoin; Dichlorantin; Dichlorodimethylhydantoin; Halane; Hydan; Hydan (antiseptic); N,N’-Dichloro-5,5-dimethylhydantoin; N,N’-Dichlorodimethylhydantoin