4-Dodecylbenzenesulfonic acid is primarily used as a surfactant in industrial and household cleaning products, effectively reducing surface tension to aid in the removal of dirt and grease. It is a key ingredient in the formulation of detergents, including laundry and dishwashing liquids, due to its strong emulsifying, foaming, and dispersing properties. In the petroleum industry, it acts as a demulsifier to break down water-oil emulsions during crude oil processing. It is also applied in the production of lubricants and corrosion inhibitors to enhance performance and stability. Additionally, its role as an emulsifier extends to paints, inks, and coatings for improved ingredient dispersion and stability. Furthermore, it serves as a catalyst or intermediate in organic synthesis and petrochemical processes, broadening its utility in chemical manufacturing.