Profile: Dah Diing Chemical Industry Co., Ltd. deals with catalysts for solvent-based paint systems and aqueous paint systems. We are ISO 9001:2000 certified. Our products are p-toluene sulfonic acid, xylene sulfonic acid, sodium xylene sulfonate and sodium cumene sulphonate. Our xylene sulfonic acid (XSA) is a viscous liquid that is soluble in water. It has a specific gravity of 1.28 at 25°C. It is used in the production of sodium xylene sulfonate and xylenol. Our sodium xylene sulfonate (SXS) is a yellowish liquid with a specific gravity of 1.16 to 1.19. It acts as a surface active agent to be applied in cleaners.