1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-4-((4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-1-(4-sulfophenyl)-, sodium salt 4,5-Dihydro-5-oxo-4-((4-((2-(sulphooxy)ethyl)sulphonyl)phenyl)azo)-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid, sodium salt 85567-10-8 EINECS 287-722-1