6391-23-7 Disodium 4-((4-((4-((6-((4-aminobenzoyl)amino)-1-hydroxy-3-sulphonato-2-naphthyl)azo)benzoyl)amino)phenyl)azo)-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylate EINECS 229-001-6