85005-98-7 Disodium hydrogen 4,5-dihydro-4-((2-methoxy-5-methyl-4-((2-(sulphonatooxy)ethyl)sulphonyl)phenyl)azo)-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate EINECS 285-028-3