ketene

American  

[kee-teen] / ˈki tin /

noun

Chemistry.

1. a colorless, poisonous gas, C 2 H 2 O, irritating to the lungs, prepared from acetone or acetic acid by pyrolysis: used chiefly in the manufacture of certain commercial chemicals, as acetic anhydride and aspirin.

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ketene British  

/ ˈkiːtiːn, ˈkɛt- /

noun

1. Also called: ethonone.  a colourless irritating toxic gas used as an acetylating agent in organic synthesis. Formula: CH 2 :CO

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Etymology

Origin of ketene

First recorded in 1905–10; ket- + -ene

Example Sentences

They discovered that ketene is formed at lower temperature settings than previously believed — and that it accumulated at levels dangerous to individual health.

From Salon

Now, a new study by Portland State University's Robert Strongin, doctoral student Kaelas Munger, and Robert Jensen reveals that when cannabinoid acetates in marijuana vaping products are heated under vaping conditions, they create a toxic gas called ketene.

From Salon

In their study, the researchers studied how much ketene was produced from a single puff of vaping products.

From Salon

The American Chemical Society describes ketene as "a colorless, toxic gas with a 'penetrating' odor," and a 2020 study from the scientific journal "Proceedings of the National Academy of Sciences of the United States of America" found that ketene "has been reported to cause severe, acute lung damage" when studied in animals.

From Salon

Although ketene is known to be toxic, it is so dangerous that it is difficult to directly study its effect on the human body.

From Salon