{"product_id":"indicating-desiccant-anhydrous-calcium-sulfate-8-mesh-5lb-23005","title":"Drierite Indicating Desiccant, Anhydrous Calcium Sulfate, 8 Mesh, 5 lb., W.A Hammond, 23005","description":"\u003cp\u003e\u003cstrong\u003eW.A. Hammond® Drierite® Indicating Desiccant, Anhydrous Calcium Sulfate, 8 Mesh, 5 lb., 23005\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eImpregnated with cobalt chloride which changes from blue to pink when desiccant absorbs moisture\u003c\/li\u003e\n\u003cli\u003eColor change is pronounced and clearly visible\u003c\/li\u003e\n\u003cli\u003eMakes indicating desiccant valuable when necessary to know with certainty that dryness is being maintained and to signal when drying agent should be replaced or regenerated\u003c\/li\u003e\n\u003cli\u003eCobalt chloride also increases the effectiveness of desiccant over plain desiccant because of its own desiccating effect\u003c\/li\u003e\n\u003cli\u003eDrierite® can be regenerated!\u003c\/li\u003e\n\u003cli\u003eFor regeneration of desiccant, granules may be spread in layers one granule deep and heated for 1 hour at 210 degrees C (425 degrees F)\u003c\/li\u003e\n\u003cli\u003eRegenerated material should be placed in the original glass or metal container and sealed while hot\u003c\/li\u003e\n\u003cli\u003eColor of the Indicating Drierite® may become less distinct on successive regenerations due to migration of indicator into interior of granules and sublimation of indicator\u003c\/li\u003e\n\u003cli\u003eTemperature at which desiccants are regenerated is crucial in restoring Drierite® to its original condition\u003c\/li\u003e\n\u003cli\u003eAbsorbed moisture is water of hydration and is chemically bound to the calcium sulfate of Drierite®\u003c\/li\u003e\n\u003cli\u003eTemperatures in the range of 400° to 450°F are required to break these bonds and release absorbed moisture\u003c\/li\u003e\n\u003cli\u003eLower temperatures, regardless of heating time, will not regenerate Drierite® unless applied under vacuum (26 in. Hg., 325 degrees F or 28 in. Hg., 275 degrees F)\u003c\/li\u003e\n\u003cli\u003eCare should be taken not to overheat desiccant since high temperatures can alter the crystal structure and render desiccants permanently inactive\u003c\/li\u003e\n\u003cli\u003eAppearance: blue granules when fresh and pink when needing replaced or regenerated\u003c\/li\u003e\n\u003cli\u003eCAS Nos.:\u003cul\u003e\n\u003cli\u003eCalcium Sulfate: 7778-18-9\u003c\/li\u003e\n\u003cli\u003eCobalt Dichloride: 7646-79-9\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"W.A. Hammond Drierite","offers":[{"title":"EA (1)","offer_id":51110923927867,"sku":"90-6247-23-EA","price":167.12,"currency_code":"USD","in_stock":true},{"title":"CS (4)","offer_id":51110923960635,"sku":"90-6247-23-CS","price":668.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-6247-23.png?v=1785296001","url":"https:\/\/preiser.com\/products\/indicating-desiccant-anhydrous-calcium-sulfate-8-mesh-5lb-23005","provider":"Preiser Scientific","version":"1.0","type":"link"}