Removes moisture from air, gases, refrigerants, organic liquids and mixed solvents. Use to maintain a dry atmosphere in storage vaults and commercial packages. Drierite® is anhydrous calcium sulfate that instantly absorbs 6.6 to 14% of its weight in water. Chemically stable, neutral and inert except toward water; insoluble in organic liquids and refrigerants. May be regenerated by heating at 200 to 225°C for one to two hours. Available in 4 and 8 mesh sizes.