SEARCH Articles Figures Tables 2.4- Dichlorodiphenyl ether (PCDE 4,4 -Dichlorodiphenyl diselenide 4,4 -Dichlorodiphenyl sulfone (DCDPS 4,4 -Dichlorodiphenyl sulphone Dichlorodiphenyl ether Dichlorodiphenyl oxide Dichlorodiphenyl sulfone Dichlorodiphenyl-trichloroethane Dichlorodiphenyl-trichloroethane production Disodium 3,3 -disulfonate-4,4 dichlorodiphenyl sulfon Sulfonated 4,4 -dichlorodiphenyl