4-hydroxy-4'-benzenazoazobenzene, 4'-(Phenylazo)azobenzene-4-ol, Terasil Golden Yellow R, Esterquinone Light Yellow 3RLL, 4-[[4-(phenylazo)phenyl]azo]-pheno, C.I. Disperse yellow 23, 4-<p-(phenylazo)-phenylazo>-phenol, 4-[4-(Phenylazo)phenylazo]phenol, 4-hydroxybisazobenzene, Disperse golden yellow E-3RL, 4-hydroxyphenylazo-4-(4-phenylazo)benzene, 4-(4-Hydroxyphenylazo)-azobenzen, p-[p-phenylazophenylazo]phenol, Laytl Yellow 4RL