p-[[p-(phenylazo)phenyl]azo]phenol, also known as Azo dye, is an organic compound with the chemical formula C18H14N4O. It is a type of azo compound, characterized by the presence of one or more azo groups (-N=N-). This particular compound is a derivative of phenol, with two azo groups attached to a phenyl ring. The first azo group is connected to a phenyl ring, which in turn is connected to another phenyl ring through another azo group. This structure gives the compound its distinct properties, such as its ability to form colored compounds when combined with other substances. Azo dyes like this one are widely used in various industries, including textiles, plastics, and printing, due to their vibrant colors and stability. However, concerns have been raised about their potential environmental and health impacts, leading to increased scrutiny and regulation of their use.