145733-01-3 1H-Pyrazole-3-carboxylic acid, 4-((5-amino-2-sulfophenyl)azo)-4,5-dihydro-5-oxo-1-(4-sulfophenyl)- 4-((5-Amino-2-sulphophenyl)azo)-4,5-dihydro-5-oxo-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid 63400-64-6 EINECS 264-128-0