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Maybe I wasn't clear. Ammonia is burning is not the worry. Ammonia in small quantities will kill you directly. no fire needed, it will kill you.

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To be clear, "small quantities" are in units of parts per million. 5ppm (0.0005%) and the room smells of ammonia, 25ppm means you should be wearing a respirator, 500 ppm (0.05%) can be lethal.

Warning that 15% air-ammonia mixtures can burn is like warning that 100 kg of TNT could give you a concussion if it fell on your head. It's just not the concern at all.

This risk factor sounds less like a normal chemical substance and more on the level of uranium

It’s comparable to carbon monoxide, except you can’t smell that one.

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