dodecylbenzenesulfonic

Dodecylbenzenesulfonic acid is an organic compound with the chemical formula C18H30O3S. It is a type of anionic surfactant. It is characterized by a benzene ring substituted with a linear dodecyl (12-carbon) alkyl chain and a sulfonic acid group. This structure makes it amphiphilic, meaning it has both a hydrophilic (water-attracting) and a hydrophobic (water-repelling) part.

The primary application of dodecylbenzenesulfonic acid is as a precursor to its salts, particularly sodium dodecylbenzenesulfonate (SDBS). SDBS is a widely used surfactant in detergents, cleaning products, and industrial applications due to its excellent foaming and cleaning properties. It effectively reduces the surface tension of water, allowing it to wet surfaces more easily and emulsify oils and grease.

Dodecylbenzenesulfonic acid itself is a strong acid. It is typically produced through the sulfonation of dodecylbenzene. The linear alkyl chain is preferred over branched chains for environmental reasons, as linear molecules are generally more biodegradable. Its use is prevalent in household laundry detergents, dishwashing liquids, and various industrial cleaning formulations. It can also be found in some personal care products.