130814-43-6 1H-Pyrazole-3-carboxylic acid, 4-((4-amino-2-sulfophenyl)azo)-4,5-dihydro-5-oxo-1-(4-sulfophenyl)- 24685-83-4 4-((4-Amino-2-sulfophenyl)azo)-4,5-dihydro-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylic acid 4-((4-Amino-2-sulphophenyl)azo)-4,5-dihydro-5-oxo-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid 5656-10-0 EINECS 227-103-5