disodium 6-[[1-(2-chloro-5-sulphonatophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-2-(ethylsulphonyl)benzothiazole-7-sulphonate

6-[[[1-(2-Chloro-5-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol]-4-yl]azo]-2-(ethylsulfonyl)-7-benzothiazolesulfonic acid disodium salt