disodium 1-(3-aminophenyl)-4-[[2-methoxy-4-[(3-sulphonatophenyl)azo]phenyl]azo]-1H-pyrazole-3-carboxylate

1-(3-Aminophenyl)-4-[[2-methoxy-4-[(3-sulfophenyl)azo]phenyl]azo]-1H-pyrazole-3-carboxylic acid disodium salt