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    mggordon's Avatar
    mggordon Posts: 1, Reputation: 1
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    #1

    Sep 30, 2009, 05:34 PM
    CoCl2 in hygrometers
    Why is CoCl2 used in hygrometers?
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    Sep 30, 2009, 06:04 PM

    changes color with humidity (pink to blue/purple).
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