Select a product to see it's specifcation. Cobalt chloride test paper is responsive to 50 relative humidity and above, and any direct measure of an aqueous solution. Moisture Indicator Paper undergoes a distinctive colour change from yellow/green to colourless and is free from toxic substances and carcinogens. Individuals who are exposed to this paper while handling or packing can be exposed to it’s toxic effects and a health and safety risk assessment should be carried out before use. The cobalt chloride free Moisture Indicator Paper is a safer alternative to the incumbent Humidity Indicator Paper which contain cobalt chloride (CoCl2) - now known to be carcinogenic and toxic. Moisture Indicator Paper (Cobalt chloride free) The final colour change of the test determines the relative humidity of the atmosphere in question. Relative atmospheric humidity can be quickly and easily ascertained with this test. electronics and optical systems are operational and if the goods are being protected from humidity. Humidity Indicator paper can be used to check dessicants packaged and sealed with humidity sensitive goods e.g. Cobalt Chloride Test Paper Vial of 100 Strips for Water, Moisture and Humidity Detection 78 100+ bought in past month 797 (0. Wet-strengthened Qualitative Filter Papers.Only under professional supervision. To be most effective, the color of the cobalt chloride test paper should be dark blue. Instructions: Coblat chloride test paper is a humiditiy-indicating paper. Paper indicates relative humidity by color change: pink indicates high humidity blue indicates low humidity. Warning! Substances of this experiment are toxic and highly dangerous for your health. Supplied in stoppered vials containing 100 strips per vial. The cobalt solution is carcinogenic - in the case of contact with skin, wash it away with water. When carrying out the experiment, wear gloves and protective glasses. This is because the chlorine ions force the water out of the water complex of cobalt. Adding concentrated hydrochloric acid to the solution changes the color of the solution to bluish-purple. Cobalt ions are hydrated in the solution and have a pink color. The cobalt chloride changes color because the salt in the solution dissociates into ions. Humidity indicator paper traditionally contains cobalt chloride which is known for it’s toxic and carcinogenic properties. There is a clear colour change from yellow-green to pale to colourless at approximately 2. If you add water to the bluish-purple solution, it will become pink again, while if you add concentrated hydrochloric acid to the second solution, it will become bluish-purple. Cobalt chloride free humidity indicator paper does not contain carcinogenic or toxic material. It is a convenient way to use cobalt chloride as a test for the presence of water. Pour distilled water into one glass, and concentrated hydrochloric acid into the second – the color of the solution will change to bluish-purple. Cobalt chloride paper is absorbent paper which has been soaked in cobalt chloride solution and allowed to dry. These items are dispatched from and sold by different sellers. 20 x 20 Reusable Cobalt Chloride Moisture & Leak Detection Cloth. Pour the obtained solution into two glasses. This item: Cobalt Chloride Test Papers (1 vial of 100 strips) 2,47346 (24.73/Item) +. As humidity increases, cobalt chloride changes color from sky. Dissolve 10 g of cobalt chloride (II) in 100 ml of water. Cobalt chloride, CoCl2, is a fascinating compound that changes color in response to humidity.
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