Displaying 6 results of Neomycin Sulfate Impurities Neomycin sulfate is an antibiotic used to treat bacterial infections. However, during the manufacturing process, impurities may be introduced that can affect the safety and efficacy of the drug. These impurities can include related substances, degradation products, and residual solvents. It is important to monitor and control the levels of these impurities to ensure the quality of the final product. Regulatory agencies such as the FDA have established guidelines for the acceptable limits of these impurities in neomycin sulfate.