Para-Xylene is an aromatic hydrocarbon that is primarily used in the production of terephthalic acid, a key ingredient in making polyester. It is a colorless liquid with a sweet odor and is one of the isomers of xylene, which also includes ortho-xylene and meta-xylene. This compound is produced through the catalytic reforming of naphtha or the toluene disproportionation process. Para-xylene is significant in the chemical industry due to its role in manufacturing fibers, plastics, and films, contributing to various everyday products.