4-((4-((4-Chloro-6-phenyl-1,3,5-triazin-2-yl)amino)-2-sulphophenyl)azo)-4,5-dihydro-5-oxo-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid, sodium salt 85631-76-1 EINECS 288-025-5