Synonyms: 2-Anthracenesulfonicacid,1-amino-4-[4-[(4,6-dichloro-s-triazin-2-yl)amino]-3-sulfoanilino]-9,10-dihydro-9,10-dioxo-,disodium salt (8CI); 2-Anthracenesulfonic acid,1-amino-4-[[4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-3-sulfophenyl]amino]-9,10-dihydro-9,10-dioxo-,disodium salt (9CI); Procion Blue M 3GS