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, PAA has played an important role in the development of liquid crystal displays.Liquid Gold: The Story of Liquid Crystal Displays and the Creation of an Industry, Joseph A. Castellano,
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.
See also Chemical crystallography before X-rays
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