(1,1'-Biphenyl)-3-sulfonic acid, 4-((3-((1-(2-chloro-5-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)benzoyl)amino)-4'-((2,5,6-trichloro-4-pyrimidinyl)amino)-, disodium salt 74186-18-8 Disodium 4-((3-((1-(2-chloro-5-sulphonatophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)benzoyl)amino)-4'-((2,5,6-trichloropyrimidin-4-yl)amino)(1,1'-biphenyl)-3-sulphonate EINECS 277-754-4