1,5-Naphthalenedisulfonic acid, 3,3'-((6-((2-hydroxyethyl)amino)-1,3,5-triazine-2,4-diyl)bis(imino(2-methyl-4,1-phenylene)azo))bis-, tetrasodium salt 50925-42-3 EINECS 256-851-5 Tetrasodium 3,3'-((6-((2-hydroxyethyl)amino)-1,3,5-triazine-2,4-diyl)bis(imino(2-methyl-4,1-phenylene)azo))bisnaphthalene-1,5-disulphonate