1,6-Anthracenedisulfonicacid,5-amino-8-[4-[(4,6-dichloro-s-triazin-2-yl)amino]-3-sulfoanilino]-9,10-dihydro-9,10-dioxo-,trisodium salt (7CI); 1,6-Anthracenedisulfonic acid,5-amino-8-[[4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-3-sulfophenyl]amino]-9,10-dihydro-9,10-dioxo-,trisodium salt (9CI)