disodium [(9,10-dihydro-9,10-dioxoanthracene-1,4-diyl)diimino]bis(1,2,3,4-tetrahydronaphthalenesulphonate)

Naphthalenesulfonic acid, [(9,10-dihydro-9,10-dioxo- 1,4-anthracenediyl)diimino]bis[1,2,3,4-tetrahydro -, disodium salt