para-Azoxyanisole

para-Azoxyanisole (PAA) is an organic, aromatic compound. Its chemical formula is C₁₄H₁₄N₂O₃. In a solid state, it appears as a white powder, but when heated it forms a liquid crystal. As one of the first known and most readily prepared liquid crystals,<ref name="Shao">Template:Cite journal</ref> PAA has played an important role in the development of liquid crystal displays.<ref>Liquid Gold: The Story of Liquid Crystal Displays and the Creation of an Industry, Joseph A. Castellano, Template:ISBN</ref>

Its liquid crystal range is from 118 °C to 136 °C. The solid to nematic transition is at 118 °C and the nematic to isotropic liquid transition at 136 °C.<ref name="Shao"/>