{"product_id":"indicating-drierite-anhydrous-calcium-sulfate-4-mesh-5-lb-w-a-hammond-21005","title":"Indicating Drierite, Anhydrous Calcium Sulfate, 4 Mesh, 5 lb. W.A.Hammond 21005","description":"\u003cp\u003e\u003cstrong\u003eW.A.Hammond® Indicating Drierite®, Anhydrous Calcium Sulfate, 4 Mesh, 5 lb. 21005\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImpregnated with cobalt chloride — blue when dry and changes to pink upon absorption of moisture\u003c\/li\u003e\n\u003cli\u003eColor change is pronounced and clearly visible — valuable when it is necessary to know with certainty that dryness is being maintained and to signal when drying agent should be replaced\u003c\/li\u003e\n\u003cli\u003eCobalt chloride also increases effectiveness of desiccant over plain desiccant because of its own desiccating effect\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCan be regenerated!\u003c\/strong\u003e\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 °C (425 °F)\u003c\/li\u003e\n\u003cli\u003eRegenerated material should be placed in original glass or metal container and sealed while hot\u003c\/li\u003e\n\u003cli\u003eColor of desiccant may become less distinct on successive regenerations due to migration of indicator into interior of granule 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 calcium sulfate of Drierite® — temperatures in 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 in. Hg., 325 °F or 28 in. Hg., 275 °F). \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCare should be take not to overheat desiccant since high temperatures can alter crystal structure and render desiccants permanently inactive\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"W.A. Hammond Drierite","offers":[{"title":"EA (1)","offer_id":51110609092923,"sku":"11-8460-23-EA","price":145.32,"currency_code":"USD","in_stock":true},{"title":"CS (4)","offer_id":51110609125691,"sku":"11-8460-23-CS","price":581.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/11-8460-23.png?v=1785302186","url":"https:\/\/preiser.com\/products\/indicating-drierite-anhydrous-calcium-sulfate-4-mesh-5-lb-w-a-hammond-21005","provider":"Preiser Scientific","version":"1.0","type":"link"}