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CO2 kills humans.

Does it also kill organisms? Does it also kill viruses?

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  • 5
    $\begingroup$ I'm inhaling it right now and am still alive. The dose makes the poison. $\endgroup$ – Todd Minehardt Mar 11 at 2:26
  • $\begingroup$ Does an extreme does of CO2 kill viruses? $\endgroup$ – Andy Mar 11 at 2:28
  • $\begingroup$ At what temperature and pressure? $\endgroup$ – DrMoishe Pippik Mar 11 at 2:34
  • $\begingroup$ temp: 98.6 --- pressure: 14.696 psi $\endgroup$ – Andy Mar 11 at 2:40
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    $\begingroup$ Viruses are not quite alive in the first place. $\endgroup$ – Ivan Neretin Mar 11 at 4:34
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Larger concentration of $\ce{CO2}$ directly affects only organisms with metabolism involving $\ce{CO2}$.

Killing is indirect as humans and animals fall into unconsciousness and stop breathing.

$\ce{CO2}$ is used, in mixture with $\ce{N2}$, as protective gas for packed food. It may not necessary kill bacteria, rather stops their growth.

A virus does not have metabolism, so it is not affected this way.

It may be affected indirectly as $\ce{CO2}$ dissolved in water causes mildly acidic environment.

In summary, $\ce{CO2}$ cannot be considered as desinfectant.

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