1,5-Naphthalenedisulfonic acid, 3,3'-((6-(bis(2-hydroxyethyl)amino)-1,3,5-triazine-2,4-diyl)bis(imino-4,1-phenyleneazo))bis-, tetrasodium salt 68155-60-2 EINECS 268-972-0 Tetrasodium 3,3'-((6-(bis(2-hydroxyethyl)amino)-1,3,5-triazine-2,4-diyl)bis(imino-4,1-phenyleneazo))bisnaphthalene-1,5-disulphonate