127278-99-3

Chromium, 6(or 7)-amino-4-hydroxy-3-[(2- hydroxy-3,5-dinitrophenyl)azo]-2-naphthalenesulfonate 4-hydroxy-3-[(2-hydroxy-3, 5-dinitrophenyl)azo]-6(or 7)-[(sulfomethyl)amino]-2-naphthalenesulfonate ammonium potassium sodium complexes