2,7-NAPHTHALENEDISULFONIC ACID, 3-HYDROXY-4-((2-SULFO-4-((4-SULFOPHENYL)AZO)PHEN 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-((2-sulfo-4-((4-sulfophenyl)azo)phenyl)azo)-, tetrasodium salt 2-Hydroxy-1-((4((4-sulfophenyl)azo)-2-sulfophenyl)azo)naphthalene-3,6-disulfonic acid, tetrasodium salt 6226-79-5 C.I. 27195 C.I. Acid Red 112 C.I. Acid Red 112, tetrasodium salt (8CI) EINECS 228-319-2 NSC 16216 Ponceau Red S Ponceau S Ponceau S Extra Tetrasodium 3-hydroxy-4-(2-sulphonato-4-(4-sulphonatophenylazo)phenylazo)naphthalene-2,7-disulphonate