73507-10-5 EINECS 277-487-3 Hydrogen (4-hydroxy-3-((2-hydroxy-1-naphthyl)azo)benzenesulphonamidato(2-))(N-(7-hydroxy-8-((2-hydroxy-4-nitrophenyl)azo)-1-naphthyl)acetamidato(2-))chromate(1-)