‌LABSA (linear chain alkylbenzenesulfonic acid)‌, chemical name is dodecylbenzenesulfonic acid, its chemical formula is C18H30O3S and its molecular weight is 326.494. The density of LABSA is 1.1±0.1 g/cm³, the melting point is 10℃, the boiling point is 82℃, the flash point is 85°F (about 29℃), and the appearance is a brown-yellow viscous liquid.

The main uses of LABSA include as anionic surfactant, commonly used in the formulation of various liquid and solid detergents, and can also be used as a curing catalyst for amino baking paints. In addition, LABSA plays an important role in cleaning, emulsification, wetting, additives, coupling, merceration, etc.