1,5-Naphthalenedisulfonic acid, 3, {3'-[carbonylbis[imino(2-methyl-4,1-phenylene)azo]]bis-,} tetrasodium salt 3-((4-(((4-((4,8-Disulfo-2-naphthyl)diazenyl)-3-methylanilino)carbonyl)amino)-2-methylphenyl)diazenyl)-1,5-naphthalenedisulfonic acid 3214-47-9 (TETRASODIUM SALT) AIDS-000069 AIDS000069 C.I. Direct Yellow 50 C.I. Direct Yellow 50, tetrasodium salt Direct Fast Yellow LR Direct Fast Yellow R Direct Lightfast Yellow K Direct Yellow 50 Helion Yellow RL Levacell Fast Yellow R NSC47763 (TETRASODIUM SALT) Orbantin Yellow R Pergasol Yellow 2R Pyrazol Fast Yellow RSW Sirius Light Yellow R Sirius Light Yellow R Extra