Pidolic acid is a naturally occurring amino acid that is used in the production of various pharmaceuticals and cosmetics. However, during the manufacturing process, impurities can be introduced into the product. These impurities can have negative effects on the quality and safety of the final product, and therefore must be carefully monitored and controlled. Common pidolic acid impurities include isomers, residual solvents, and byproducts of the manufacturing process. Accurate analysis and control of these impurities is essential for ensuring the safety and efficacy of pidolic acid-based products.