Linolenic acid impurities are unwanted substances that can be found in linolenic acid, a polyunsaturated fatty acid that is commonly used in food, cosmetic, and pharmaceutical industries. These impurities can be introduced during the manufacturing process or can be a result of improper storage conditions. Linolenic acid impurities can affect the quality and safety of the final product and can have negative effects on human health. Therefore, it is important to monitor and control the levels of linolenic acid impurities to ensure the purity and safety of the products.