Hydrogen sulfide

Rarity: Rare

A topic known well beyond its field, found in many languages.

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Notion

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Science and technology

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What Wikipedia says

Hydrogen sulfide (preferred IUPAC name and American English) or hydrogen sulphide (Commonwealth English) is a chemical compound with the formula H2S. It is a colorless, toxic, and flammable hydrogen chalcogenide gas. Trace amounts in the ambient atmosphere have a characteristic foul odor of rotten eggs.

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

Image: Benjah-bmm27, Public domain, via Wikimedia Commons.