2,7-Naphthalenedisulfonic acid, 4-(((2,3-dichloro-6-quinoxalinyl)carbonyl)amino)-5-hydroxy-, disodium salt 67905-53-7 Disodium 4-(((2,3-dichloro-6-quinoxalinyl)carbonyl)amino)-5-hydroxynaphthalene-2,7-disulphonate EINECS 267-674-8