Displaying 5 results of Terephthalic Acid Impurities Terephthalic acid is a chemical compound used in the production of polyester fibers and plastic bottles. However, during the manufacturing process, impurities may be introduced which can affect the quality of the final product. Some common impurities found in terephthalic acid include 4-carboxybenzaldehyde, 4-formylbenzoic acid, and 4-carboxybenzyl alcohol. These impurities can impact the purity and color of the terephthalic acid and can also affect the properties of the end product. It is important to monitor and control impurities in terephthalic acid to ensure consistent quality and performance of the final product.