cobalt chloride
noun
: a chloride of cobalt
especially
: the dichloride CoCl2 that is blue when dehydrated, turns red in the presence of moisture, and is used to indicate humidity
Examples of cobalt chloride in a Sentence
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These aren’t supposed to be used near food and contain a compound known as cobalt chloride, which several chemical manufacturers list as an irritant and a carcinogen.
—
Bridget Reed Morawski, Popular Science, 1 June 2023
Some have additives in the form of cobalt chloride or methyl violet.
—Jeff Lowenfels, Anchorage Daily News, 3 Dec. 2020
The silica used incorporates cobalt chloride, which helps to retain both the shape and color of the flowers.
—Julia Sayers, AL.com, 7 Mar. 2018
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Bridget Reed Morawski, Popular Science, 1 June 2023
Some have additives in the form of cobalt chloride or methyl violet.
—Jeff Lowenfels, Anchorage Daily News, 3 Dec. 2020
The silica used incorporates cobalt chloride, which helps to retain both the shape and color of the flowers.
—Julia Sayers, AL.com, 7 Mar. 2018
Cite this Entry
“Cobalt chloride.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cobalt%20chloride. Accessed 31 Oct. 2025.
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