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by TomSwirly 1219 days ago
> Phosgene is a highly toxic gas that can cause vomiting and breathing trouble,

I'm a mathematician, not a chemist, but I do know about about phosgene.

The memorable thing about phosgene is not that is causes "breathing trouble" but that it will kill you dead, dead, dead, and once you have a lethal dose, there is no effective treatment, and that it's a "linear poison" - small concentrations over hours and days have exactly the same effect as large concentrations for minutes (many poisons don't work that way).

https://en.wikipedia.org/wiki/Phosgene