75198-81-1 Benzenesulfonamide, 4-((4-((4-hydroxy-3-methylphenyl)azo)phenyl)amino)-N-(methylsulfonyl)-3-nitro-, monosodium salt EINECS 278-101-6 N-(4-((4-Hydroxy-3-methylphenyl)azo)phenyl)-2-nitro-4-(((methylsulfonyl)imino)sulfonyl)benzenamine, sodium salt Sodium 4-((4-((4-hydroxy-m-tolyl)azo)phenyl)amino)-N-(methylsulphonyl)-3-nitrobenzenesulphonamidate