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

4,4'-[1,2-Ethenediylbis[[3-(sodiooxysulfonyl)-4,1-phenylene]imino[6-[bis(2-hydroxyethyl)amino]-1,3,5-triazine-4,2-diyl]imino]]bis(1,3-benzenedisulfonic acid disodium) salt