1-(5-(((3,6-Dichloropyridazin-4-yl)carbonyl)amino)-2-methyl-3-sulphophenyl)-4,5-dihydro-5-oxo-4-((2-sulphophenyl)azo)-1H-pyrazole-3-carboxylic acid 1H-Pyrazole-3-carboxylic acid, 1-(5-(((3,6-dichloro-4-pyridazinyl)carbonyl)amino)-2-methyl-3-sulfophenyl)-4,5-dihydro-5-oxo-4-((2-sulfophenyl)azo)- 68399-87-1 EINECS 269-994-3