1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-, trisodium salt 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[(4-sulfo-1-naphthyl)azo]-, trisodium salt 1-(4-Sulfo-1-naphthylazo)-2-naphthol-6,8-disulfonic acid, trisodium salt 1578 Red 2611-82-7 Acid Brilliant Scarlet 3R Acid Ponceau 4R Acid Red 18 Acid Scarlet 3R Acid Scarlet 3RZ Acid Scarlet 4R Acidal Bright Ponceau 3R Acilan Scarlet V3R Aizen Brilliant Scarlet 3RH Atul Acid Scarlet 3R Atul Scarlet F Brilliant Ponceau 3R Brilliant Ponceau 3RF Brilliant Ponceau 4R Brilliant Ponceau 4RC Brilliant Ponceau 4RC Specially Pure Brilliant Ponceau 5R Brilliant Scarlet Brilliant Scarlet 3R (Biological stain) Brilliant Scarlet 4R Brilliant scarlet 3r Bucacid Brilliant Scarlet 3R C.I. 16255 C.I. Acid Red 18 C.I. Acid