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

5-Amino-8-[[4-[[4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-(sodiooxysulfonyl)phenyl]azo]phenyl]amino]-9,10-dihydro-9,10-dioxo-1,6-anthracenedisulfonic acid disodium salt