Applications PropelLinear Alkyl Benzene (LAB) with appropriate chain length is predominantly used as a raw material in the manufacture of Linear Alkyl Benzene Sulphonic Acid (LABSA) by reaction with Sulfuric Acid in liquid phase or by Sulfur Trioxide in gaseous phase. In downstream segment, LABSA is then neutralized with Caustic Soda to form its Sodium salt LAS-Na. This surfactant is used in the manufacture of synthetic detergents in liquid, cake or powder form. Very small amounts of LAB are also known to have uses in ink manufacture.