1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-4-((4-(((3-((2-(sulfooxy)ethyl)sulfonyl)phenyl)amino)carbonyl)phenyl)azo)-1-(4-sulfophenyl)-, trisodium salt 72187-36-1 87074-88-2 EINECS 276-449-3 Trisodium 4,5-dihydro-5-oxo-4-((4-(((3-((2-(sulphonatooxy)ethyl)sulphonyl)phenyl)amino)carbonyl)phenyl)azo)-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate