Quote Originally Posted by khronik
Chloride ions will never recombine to form chlorine gas, at least as long as the ionic solution isn't electrolyzed
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This is because chlorine gas turns into hypochlorous acid when it reacts with the linings of our nasal passages.
I stand corrected; I am under the impression however that fluctuations in pH also will drive Cl out of solution.

And interesting bit of info: Smell receptors for Cl2.