1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-(1-naphthalenylazo)-, disodium salt (9CI) 2-Hydroxy-1,1'-azonaphthalene-6,8-disulfonate, sodium salt 2766-77-0 Acid Leather Ponceau 6R Acid Ponceau 6R Acid Red 6A Acidal Crystals Ponceau C.I. 16250 C.I. Acid Red 44 C.I. Acid Red 44, disodium salt (8CI) Colacid Red 6A Crystal Ponceau Crystal Ponceau 6R Crystal Ponceau M6R Crystal Scarlet 6R Crystal Tertracid Ponceau 6R EINECS 220-441-4 NSC 45582 NSC 7834 Ponceau 6R (VAN) Ponceau 6R Crystals Ponceau Cristallise Extra A Export Ponceau Crystals 6R Sodium 6-hydroxy-5-(1-naphthylazo)naphthalene-2,4-disulphonate