1-(2,5-Dichloro-4-sodiosulfophenyl)-4-(5-dodecyloxycarbonylamino-2-sodiosulfophenylazo)-3-methyl-2-pyrazolin-5-one

disodium 2,5-dichloro-4-[4-[[5-[[(dodecyloxy)carbonyl]amino]-2-sulphonatophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonate

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