1-(3-Aminophenyl)-4-((2-ethoxy-4-((3-sulfophenyl)azo)phenyl)azo)-5-oxo-2-pyrazolin-3-carboxylic acid, sodium salt 1H-Pyrazole-3-carboxylic acid, 1-(3-aminophenyl)-4-((2-ethoxy-4-((3-sulfophenyl)azo)phenyl)azo)-4,5-dihydro-5-oxo-, monosodium salt 67786-19-0