Synonyms: 2,2'-Stilbenedisulfonicacid, 4,4'-bis(7-sulfo-2H-naphtho[1,2-d]triazol-2-yl)-, tetrasodium salt(6CI,8CI); 2H-Naphtho[1,2-d]triazole-7-sulfonic acid,2,2'-[vinylenebis(3-sulfo-p-phenylene)]bis-, tetrasodium salt (7CI);4,4'-Bis(6-sulfo-2H-naphtho[1,2-d]triazol-2-yl)-2,2'-stilbenedisulfonic acidtetrasodium salt; C.I. 406472; C.I. Fluorescent Brightener 47; Tinopal GS