Used primarily in the production of polyethylene terephthalate (PET), a common polyester. PET is widely used in manufacturing plastic bottles for beverages, food containers, and synthetic fibers for textiles and clothing. PTA is also employed in the synthesis of other industrial polyesters and plasticizers, contributing to the production of films, resins, and engineering plastics. Its high purity and thermal stability make it suitable for applications requiring durable and clear materials. Additionally, it plays a role in coatings and adhesives where strong chemical resistance is needed.