Oleic acid is a fatty acid commonly used in the production of soaps, detergents, and personal care products. However, it can contain impurities that can affect the quality and purity of the final product. Impurities such as stearic acid, palmitic acid, and linoleic acid can affect the chemical composition and properties of oleic acid. Controlling and minimizing these impurities is crucial for ensuring the consistency and effectiveness of oleic acid in various applications.