These findings put ethenone in the same order of toxicity as phosgene (0.2–20 mg/liter) and hydrogen cyanide (0.2-0.5 mg/liter).
Disse studier anbragte ethenon i samme giftighedskategori som fosgen (0,2–20 mg/liter) og blåsyre (hydrogencyanid, 0,2-0,5 mg/liter).