Carminic acid

Rarity: Uncommon

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Notion

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Science and technology

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What Wikipedia says

Carminic acid (C22H20O13) is a red glucosidal hydroxyanthrapurin that occurs naturally in some scale insects, such as the cochineal, Armenian cochineal, and Polish cochineal. The insects produce the acid as a deterrent to predators. An aluminum salt of carminic acid is the coloring agent in carmine, a pigment.

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

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