Displaying 6 results of Pyridoxal Impurities Pyridoxal is a form of vitamin B6 that is commonly used as a dietary supplement. However, during the manufacturing process, impurities can be introduced which can affect the purity, effectiveness, and safety of the final product. Pyridoxal impurities can include by-products of chemical reactions, residual solvents, and other contaminants. It is important to identify and control these impurities to ensure the quality and safety of pyridoxal supplements.