Drierite- Indicating Desiccant, Anhydrous Calcium Sulfate

1 pound jar. #10-20 mesh. Neutral in reaction, chemically stable, constant in volume, inert except toward water, non-poisonous, non-corrosive, and repeatedly regenerative. Dries gases at 75 degrees F to a terminal dryness of .005 milligram of moisture per liter of gas. Indicating Drierite is blue when dry and rose-red upon absorption of moisture. Regeneration: Heat in 200-225 degree C oven for 1-2 hours. Mesh sizes: 4, 6, 8, 10-20, and 20-40; *Non-indicating Drierite also available.