Synonyms: Coumarin,7-(2H-naphtho[1,2-d]triazol-2-yl)-3-phenyl- (7CI,8CI);2H-Naphtho[1,2-d]triazole, 2H-1-benzopyran-2-one deriv.;3-Phenyl-7-(2H-naphtho[1,2-d]triazol-2-yl)coumarin;7-(2H-Naphtho[1,2-d]triazol-2-yl)-3-phenylcoumarin; C.I. 55135; C.I.Fluorescent Brightener 236; Fluorescent Brightener 236; Hakkol PSR; LeucophorEGM; Leukopur EGM