2-((3-Amino-4-nitrophenyl)azo)-4-((2-methoxy-5-sulfophenyl)azo)-1,3-benzenediol, sodium salt 67786-15-6 Benzenesulfonic acid, 3-((3-((3-amino-4-nitrophenyl)azo)-2,4-dihydroxyphenyl)azo)-4-methoxy-, monosodium salt EINECS 267-091-9 Sodium 3-((3-((3-amino-4-nitrophenyl)azo)-2,4-dihydroxyphenyl)azo)-4-methoxybenzenesulphonate