Synonyms: 1,5-Naphthalenedisulfonicacid, 3,3'-[carbonylbis[imino(5-methoxy-2-methyl-4,1-phenylene)azo]]bis-,tetrasodium salt (9CI); 1,5-Naphthalenedisulfonic acid,3,3'-[ureylenebis[(5-methoxy-2-methyl-p-phenylene)azo]]di-, tetrasodium salt(8CI); C.I. 29060; C.I. Direct Yellow 34; C.I. Direct Yellow 34, tetrasodiumsalt; Direct Fast Yellow P 3RL; Direct Light Yellow M 3RL; Helion Gold Yellow3RL; Helion Golden Yellow 3RL; Solamine Fast Yellow 3RLN