Eliminate problems caused by humidity with Drierite. This anhydrous calcium sulfate is an all-purpose desiccant for drying air, gases, refrigerants, organic liquids, mixed solvents, or atmosphere in storage spacesor packages. Non-poisonous. Absorbs 10 to 14% by weight when drying gases. Changes from blue to red to show absorption of moisture. Regenerated by heating. 8 mesh. 4/case.