Ammonium Lauryl Sulfate (ALS) is a surfactant commonly used in personal care products such as shampoos, bath products, and cleansers. It acts as a cleansing and foaming agent, helping to remove dirt and oils from the skin and hair. ALS is derived from coconut oil and reacts with water to create a lather, making it effective in cleaning and emulsifying properties. It's known for its ability to produce rich foam and is generally considered safe for use in cosmetics when used in appropriate concentrations. However, like many surfactants, it can be drying to the skin and hair if used excessively or in individuals with sensitive skin.