trisodium 8-[[4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-3-sulphonatophenyl]amino]-9,10-dihydro-9,10-dioxoanthracene-1,6-disulphonate

8-[[4-[(4,6-Dichloro-1,3,5-triazin-2-yl)amino]-3-sodiosulfophenyl]amino]-9,10-dihydro-9,10-dioxo-1,6-anthracenedisulfonic acid disodium salt