Alkylphenol Ethoxylates (APEOs) are typically pale yellow to colorless viscous liquids or pastes at room temperature (varying with the degree of ethoxylation), readily soluble in water and most organic solvents. As non-ionic surfactants, they exhibit stable chemical properties, with good resistance to acids, alkalis, and hard water, along with excellent emulsifying, dispersing, and wetting capabilities. They were once widely used as industrial cleaners, textile dyeing and printing auxiliaries, pesticide emulsifiers, and emulsifiers for synthetic resins and latexes. However, due to the environmental hormone effects and bioaccumulative potential of their metabolites (such as nonylphenol), which pose risks to ecosystems and organisms, their use in many consumer product areas (e.g., household and personal care detergents) has been strictly restricted or phased out. Currently, they are primarily limited to certain closed-loop industrial processes.