1,7-Naphthalenedisulfonic acid, 4-((3-((2-chloroethyl)sulfonyl)benzoyl)amino)-5-hydroxy-6-((2-sulfophenyl)azo)- 4-((3-((2-Chloroethyl)sulphonyl)benzoyl)amino)-5-hydroxy-6-((2-sulphophenyl)azo)naphthalene-1,7-disulphonic acid 54518-41-1 EINECS 259-196-3