1,7-Naphthalenedisulfonic acid, 4-((2,4-dichlorobenzoyl)amino)-5-hydroxy-6-((2-methoxyphenyl)azo)-, disodium salt 6416-33-7 Disodium 4-((2,4-dichlorobenzoyl)amino)-5-hydroxy-6-((2-methoxyphenyl)azo)naphthalene-1,7-disulphonate EINECS 229-124-5