Sulfur trioxide

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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

Sulfur trioxide (alternative spelling sulphur trioxide) is the chemical compound with the formula SO3. It has been described as "unquestionably the most [economically] important sulfur oxide".

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

Image: Joel Holdsworth, Public domain, via Wikimedia Commons.