Carbon diselenide

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What Wikipedia says

Carbon diselenide is an inorganic compound with the chemical formula CSe2. It is a yellow-orange oily liquid with a pungent odor. It is the selenium analogue of carbon disulfide (CS2) and carbon dioxide (CO2). This light-sensitive compound is insoluble in water and soluble in organic solvents.

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

Image: Ben Mills, Public domain, via Wikimedia Commons.