disodium 3,3'-[(2,5-dichloro-3,6-dioxocyclohexa-1,4-diene-1,4-diyl)diimino]bis[6-anilinobenzenesulphonate]

5,5'-[(2,5-Dichloro-3,6-dioxo-1,4-cyclohexadiene-1,4-diyl)diimino]bis[2-(phenylamino)benzenesulfonic acid sodium] salt