Displaying 1 results of Aminolevulinic Acid Impurities Aminolevulinic acid is a pharmaceutical compound used for photodynamic therapy, a treatment for certain cancers and skin conditions. However, impurities can arise during the manufacturing process, which can affect the safety, efficacy, and quality of the final product. These impurities can include related substances, residual solvents, and heavy metals. Therefore, it is crucial to monitor and control the impurities during the production process to ensure the purity and safety of the medication.