2-Naphthalenesulfonic acid, 6-hydroxy-5-((3-sulfophenyl)azo)-, disodium salt 2347-72-0 6-Hydroxy-5-((3-sulfophenyl)azo)-2-naphthalenesulfonic acid, disodium salt C.I. FOOD ORANGE 2 CI 15980 Disodium 6-hydroxy-5-((3-sulfophenyl)azo)-2-naphthalenesulfonate Disodium 6-hydroxy-5-((3-sulphonatophenyl)azo)naphthalene-2-sulphonate E 111 EINECS 219-073-7 Food orange 2