( granular )
Drierite® is an all purpose
drying agent for the efficient and rapid drying of air, gases,
liquids and solids. It is composed of naturally occurring Calcium Sulfate,
impregnated with Cobalt Chloride. Drierite® is blue when dry and changes
to pink upon absorption of moisture.
Drierite® can be regenerated simply by heating in
an oven where it will return to its normal blue color.
( Material Safety Data Sheet )