Phenol,4-((4-((4-nitrophenyl)azo)phenyl)azo), EINECS 254-003-9, p-({p-[(p-nitrophenyl)azo]phenyl}azo)phenol, Phenol,4-(2-(4-(2-(4-nitrophenyl)diazenyl)phenyl)diazenyl), 4-[4-(4-Nitro-phenylazo)-phenylazo]-phenol, (4-Nitro-benzol)-(1 azo 1)-benzol-(4 azo 4)-phenol, 4-<p-(nitrophenylazo)-phenylazo>-phenol