Sodium 1-undecyl sulfate is primarily used as a surfactant in various cleaning and personal care products. Its ability to reduce surface tension makes it effective in formulations for detergents, shampoos, and body washes, where it helps to remove dirt and oils from surfaces and skin. In industrial applications, it is utilized as a wetting agent and emulsifier, aiding in the mixing of oil and water-based components. Additionally, it finds use in research and laboratory settings as a reagent for studying surfactant behavior and properties. Its mildness and foaming characteristics also make it suitable for use in cosmetics and skincare products, where it contributes to a smooth and creamy texture.