5-Chloro-6-(4,5-dihydro-4-((2-methoxy-5-((2-(sulphooxy)ethyl)sulphonyl)phenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)toluene-3-sulphonic acid, sodium salt 94109-48-5 EINECS 302-489-9