Indicating Drierite is impregnated with cobalt chloride. This desiccant is blue when dry and changes to pink upon absorption of moisture. The color change is pronounced and clearly visible. This makes Indicating Drierite valuable when it is necessary to know with certainty that dryness is being maintained and to signal when the drying agent should be replaced. It has the same efficiency as Regular Drierite and can be regenerated for reuse. Complies with ASTM D2041.
