Propoxur impurities are substances that are present in small amounts within the chemical compound Propoxur. These impurities may arise during the manufacturing process or due to exposure to environmental factors. Impurities can affect the purity, safety, and efficacy of the final product, so it's essential to monitor and control their levels. Propoxur impurities may include residual solvents, degradation products, or other contaminants, and their identification and quantification are crucial for ensuring the quality and safety of the product.