p-xylene is an aromatic hydrocarbon with the chemical formula C₈H₁₀. It is a colorless liquid that has a sweet odor and is primarily used as a solvent and in the production of various chemicals. p-xylene is one of the three isomers of xylene, the others being o-xylene and m-xylene. This compound is mainly produced from petroleum and is a key ingredient in the manufacture of terephthalic acid, which is essential for producing polyester fibers and plastics. Additionally, p-xylene is used in the production of pharmaceuticals and other industrial applications.