disodium 2-[[[5-[[1-(2,5-dichloro-4-sulphonatophenyl)-4,5-dihydro-3-methyl-5-oxo(1H)-pyrazol-4-yl]azo]-2-methylphenyl]sulphonyl]amino]benzoate

2-[[[5-[[[1-(2,5-Dichloro-4-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol]-4-yl]azo]-2-methylphenyl]sulfonyl]amino]benzoic acid disodium salt