Dodecyl benzene sulfonic acid is a chemical compound commonly used as a surfactant in cleaning products and detergents. It is derived from benzene and sulfuric acid, and is often used for its cleansing and emulsifying properties. Dodecyl benzene sulfonic acid is effective at removing stains, dirt and grease, making it a popular ingredient in laundry detergents, floor cleaners and industrial cleaning products. It is known for its ability to produce abundant foam and to be effective in hard water.