4-((5-((4,6-Dichloro-1,3,5-triazin-2-yl)amino)-2-sulphophenyl)azo)-4,5-dihydro-5-oxo-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid, potassium sodium salt 85631-78-3 EINECS 288-027-6