Oleic Acid is a fatty acid with the chemical formula C18H34O2. It is classified as a monounsaturated omega-9 fatty acid and is a key component of many natural fats and oils, particularly olive oil. Pure oleic acid is a colorless or pale yellow liquid that is insoluble in water but soluble in organic solvents. It has a variety of industrial and commercial applications.

One of the primary uses of oleic acid is in the production of soaps and detergents. It acts as a surfactant, helping to break down and remove oils and greases from surfaces. Additionally, oleic acid is used in the manufacture of cosmetics, such as creams, lotions, and shampoos, due to its emollient properties, which help soften and moisturize the skin and hair. It is also utilized in the food industry as a food additive and flavoring agent, especially in the production of processed foods and snacks.