for the following products
Disodium 2-chloro-5-(4-chloro-3-sulfonatophenyl)sulfonylbenzenesulfonate | Disodium 3,3'-sulfonylbis(6-chlorobenzenesulfonate) | Disodium diphenylsulfone-4,4'-dichloro-3,3'-disulfonate and 4,4'-Dichlorodiphenylsulfone-3,3'-disulfonic acid disodium salt
