1H-Pyrazole-3-carboxylic acid, 4-(5-(3-carboxy-5-hydroxy-1-(4-sulfophenyl)-1H-pyrazol-4-yl)-2,4-pentadienylidene)-4,5-dihydro-5-oxo-1-(4-sulfophenyl)-, dipotassium salt 51858-17-4 Dipotassium dihydrogen 4-(5-(3-carboxylato-5-hydroxy-1-(4-sulphonatophenyl)-1H-pyrazol-4-yl)penta-2,4-dienylidene)-4,5-dihydro-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate EINECS 257-479-6