Sodium sulfate is the inorganic compound with formula Na?SO? as well as several related hydrates. All forms are white solids that are highly soluble in water. Sodium sulfate is used to dry organic liquids. This chemical compound is used for the production of powdered home laundry detergents. As a fining agent which removes small air bubbles from molten glass. RUM is one of the highest producers of this product located in Sukoharjo, with production capacity up to 40,000 tons a year.