51931-46-5 6421-65-4 Bis(3-((4-chlorophenyl)azo)quinoline 2,4(1H,3H)-dionato)nickel EINECS 257-521-3 Nickel, bis(3-((4-chlorophenyl)azo)-2,4(1H,3H)-quinolinedionato)- Nickel, bis(3-((4-chlorophenyl)azo-kappaN1)-2,4(1H,3H)-quinolinedionato-kappaO4)-