Benzenesulfonic acid, 2,5-dichloro-4-(4,5-dihydro-3-methyl-5-oxo-4-((4-sulfophenyl)azo)-1H-pyrazol-1-yl)-, disodium salt

disodium;2,5-dichloro-4-[3-methyl-5-oxo-4-[(4-sulfonatophenyl)diazenyl]-4H-pyrazol-1-yl]benzenesulfonate

FTZLWXQKVFFWLY-UHFFFAOYSA-L

CC1=NN(C(=O)C1N=NC2=CC=C(C=C2)S(=O)(=O)[O-])C3=CC(=C(C=C3Cl)S(=O)(=O)[O-])Cl.[Na+].[Na+]