1-Octadecanol, also known as stearyl alcohol, is a fatty alcohol with the chemical formula C18H38O. It appears as a white, waxy solid at room temperature and is derived either from natural sources, such as plant oils, or produced synthetically. 1-Octadecanol is widely used in various industries, including cosmetics, pharmaceuticals, and food processing, primarily as an emollient, emulsifier, and thickening agent. Its hydrophobic properties make it effective in enhancing the texture and stability of formulations. Additionally, 1-octadecanol plays a role in the production of surfactants and lubricants, showcasing its versatility across multiple applications.