2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-(((4-methylphenyl)sulfonyl)amino)-3-(phenylazo)-, disodium salt 6844-74-2 C.I. ACID RED 106 DISODIUM SALT C.I. Acid Red 106 C.I. Acid Red 106, disodium salt Disodium 4-hydroxy-3-phenylazo-5-((p-tolyl)sulphonylamino)naphthalene-2,7-disulphonate EINECS 229-931-2