(3-((3-((5-Chloro-2-hydroxyphenyl)azo)-2,6-dihydroxyphenyl)azo)-2-hydroxy-5-nitrobenzenesulphonato(3-))iron 73507-31-0 Benzenesulfonic acid, 3-((2,6-dihydroxy-3-((5-chloro-2-hydroxyphenyl)azo)phenyl)azo)-2-hydroxy-5-nitro-, 1:1 complex with iron (III), polymer, sodium salt EINECS 277-503-9 Iron, (3-((3-((5-chloro-2-hydroxyphenyl)azo)-2,6-dihydroxyphenyl)azo)-2-hydroxy-5-nitrobenzenesulfonato(3-))-