Nonionic surfactants are a type of surface-active agent that do not carry any electrical charge. They are commonly used in various applications, including cleaning products, detergents, and personal care items. Their lack of charge allows them to be effective in a wide range of pH levels and makes them less sensitive to water hardness compared to ionic surfactants. These surfactants work by reducing the surface tension of liquids, which helps to improve the spreading and wetting properties of formulations. Nonionic surfactants are often derived from natural sources, such as fatty acids or sugar, making them suitable for eco-friendly products.