4,4'-Bis-(4-hydroxy-phenylazo)-stilben-2,2'-disulfonsaeure, Direct Yellow 4 dye, Benzenesulfonic acid,2,2'-(1,2-ethenediyl)bis(5-((4-hydroxyphenyl)azo), 4,4'-bis-(4-hydroxy-phenylazo)-stilbene-2,2'-disulfonic acid, Brillantgelb, 4,4'-Bis-(4-hydroxy-benzolazo)-stilbendisulfonsaeure-(2,2'), EINECS 202-062-6, (Stilben-disulfonsaeure-(2.2'))-4.4'-bis-[(azo 4)-phenol], 4,4'-Bis((4-hydroxyphenyl)azo)stilbene-2,2'-disulphonic acid, C.I. DIRECT YELLOW 4