Crotonic acid

Rarity: Uncommon

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Notion

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Science and technology

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What Wikipedia says

Crotonic acid ((2E)-but-2-enoic acid) is a short-chain unsaturated carboxylic acid described by the formula CH3CH=CHCO2H. The name crotonic acid was given because it was erroneously thought to be a saponification product of croton oil. It crystallizes as colorless needles from hot water.

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

Image: Yikrazuul (talk), Public domain, via Wikimedia Commons.