72245-21-7 Azo dye Benzenesulfonic acid, 2-amino-5-nitro-, monosodium salt, diazotized, coupled with diazotized 3-aminobenzenesulfonic acid monosodium salt, diazotized 2-((4-aminophenyl)amino)-5-nitrobenzenesulfonic acid monosodium salt and 4-((2-hydroxy-3,5-dinitrophenyl)azo)-1,3-benzenediol EINECS 276-520-9