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Ace Glass, Inc. Drierite, indicating, 8 mesh

Supplier: Ace Glass, Inc. 1017519
The granules of calcium sulfate are impregnated with C.P. cobalt chloride. On dehydration, the active desiccant assumes a distinct blue color. In use, the color changes to a rose-red as the margin between the exhausted and active desiccant progresses through the tube or tower.
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