Synonyms: Disodium hydrogen 4,4'-bis((4-(bis(2-hydroxyethyl)amino)-6-((4-sulphonatophenyl)amino)-1,3,5-triazin-2-yl)amino)stilbene-2,2'-disulphonate;disodium 4,4'-{(E)-ethene-1,2-diylbis[(3-sulfobenzene-4,1-diyl)imino{6-[bis(2-hydroxyethyl)amino]-1,3,5-triazine-4,2-diyl}imino]}dibenzenesulfonate