octasodium 2,2'-[vinylenebis[(3-sulphonato-4,1-phenylene)imino[6-[methyl(2-sulphonatoethyl)amino]-1,3,5-triazine-4,2-diyl]imino]]bis(benzene-1,4-disulphonate)

2,2'-[1,2-Ethenediylbis[(3-sulfo-4,1-phenylene)imino[6-[methyl(2-sulfoethyl)amino]-1,3,5-triazine-4,2-diyl]imino]]bis(1,4-benzenedisulfonic acid)octasodium salt