Calcium hydride

Rarity: Uncommon

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Notion

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Science and technology

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What Wikipedia says

Calcium hydride is the chemical compound with the formula CaH2, an alkaline earth hydride. This grey powder (white if pure, which is rare) reacts vigorously with water, liberating hydrogen gas. CaH2 is thus used as a drying agent, i.e. a desiccant.

Excerpt from the Wikipedia article “Calcium hydride”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Orci, CC BY-SA 3.0, via Wikimedia Commons.