93940-43-3 EINECS 300-439-0 Sodium (4-(4,5-dihydro-4-((2-hydroxy-5-nitrophenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonamidato(2-))(1-((2-hydroxy-4-nitrophenyl)azo)naphthalen-2-olato(2-))cobaltate(1-)