Cobalt chloride test paper is responsive to 50% relative humidity and above, and any direct measure of an aqueous solution. Cobalt chloride paper. c The filter paper can be cut into small strips and stored in a desiccator with dry silica gel. Is the Coronavirus Crisis Increasing America's Drug Overdoses? Cobalt chloride paper can be purchased in premade sheets, but it can also be made by dipping paper into a cobalt chloride solution and letting it dry. Details. Time is fleeting. When water is present, cobalt (II) chloride (CoCl2) test paper changes its colour from blue (anhydrous CoCl2) to purple (dihydrate CoCl2 2H2O) to pink (hexahydrate CoCl2 6H2O). 89. 20” x 20” Reusable Cobalt Chloride Moisture & Leak Detection Cloth. Instructions: Place the test strip near recesses or areas where there may be cracks/leaks. When conducting experiments, wearing gloves can ensure the substance doesn't transfer to hands. Cobalt Chloride Test Paper [Vial of 100 Strips] for Water, Moisture and Humidity Detection, FREE Shipping on orders over $25 shipped by Amazon, 20” x 20” Reusable Cobalt Chloride Moisture & Leak Detection Cloth, 100PK Cobalt Chloride Test Papers for Testing Water Presence & Humidity - Eisco Labs, Cobalt Chloride Moisture and Humidity Detection Test Paper Vial of 100 Strips, Hammermill Colored Paper, 20 lb Blue Printer Paper, 8.5 x 11-1 Ream (500 Sheets) - Made in the USA, Pastel Paper. Top subscription boxes – right to your door, © 1996-2020, Amazon.com, Inc. or its affiliates. As humidity increases, cobalt chloride will shift from blue to pink, with a purplish color serving as the mid-phase hue between these two colors. $8.89 $ 8. Image 2 of 2. Other uses are to detect the detection of moisture in crates during transportation where the presence of … They can also be used to indicate when desiccants such as silica gel are exhausted. Cobalt chloride paper can be purchased in premade sheets, but it can also be made by dipping paper into a cobalt chloride solution and letting it dry. 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