1H-Pyrazole-3-carboxylic acid, 4-((2,5-dimethoxy-4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-4,5-dihydro-5-oxo-1-(4-sulfophenyl)-, sodium salt 4-((2,5-Dimethoxy-4-((2-(sulphooxy)ethyl)sulphonyl)phenyl)azo)-4,5-dihydro-5-oxo-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid, sodium salt 85536-88-5 EINECS 287-575-3