Description
Drierite® Indicating Desiccant is impregnated with cobalt chloride. It is blue when dry and changes to pink upon absorption of moisture. The color change is pronounced and clearly visible. This makes it a valuable when it is necessary to know wiht certainty that dryness is being maintained and to signal when the drying agent should be replaced. The cobalt chloride also increases the effectiveness of the desiccant over plain desiccant because of its own desiccating effect.Drierite® can be regenerated!For the regeneration of the desiccant, the granules may be spread in layers one granule deep and heated for 1 hour at 210°C (425°F). The regenerated material should be placed in the original glass or metal container and sealed while hot. The color of the Indicating Drierite® may become less distinct on successive generations due to the migration of the indicator into the interior of the granule and sublimation of the indicator.The temperature at which the desiccants are regenerated is crucial in restoring Drierite® to its original condition. Absorbed moisture is water of hydration and is chemically bound to the calcium sulfate of Drierite®. Temperatures in the range of 400° to 450°F are required to break these bonds and release absorbed moisture. Lower temperatures, regardless of heating time, will not regenerate Drierite® unless applied under vacuum (26 Hg., 325°F or 28 Hg., 275°F). Care should be take not to overheat the desiccant since high temperatures can alter the crystal structure and render the desiccants permanently inactive.
Specifications
| Manufacturer | W.A Hammond Drierite |
|---|---|
| Model No | 22005 |
SDS PDFs
It is our policy to provide the latest Safety Data Sheet (SDS) for all chemicals we ship. Each shipment will contain copies for every chemical contained in the shipment, and for any chemical included in an instrument kit or calibration kit.
Contact us for additional copies of an SDS or for a copy of the Certificate of Analysis:
Phone: 1-800-624-8285
Email: INFO_SDS@preiser.com