That is an excellent post, and I'd encourage any DIY'ers who haven't read it to do so.
The benefit of freezer vs refrigerator is pretty negligible in my opinion. As the freezing point of the compound in solution is not attained in a consumers home freezer, we're considering only reaction kinetics, which in our closed system at equilibrium (the storage bottle) should be really minimal. Kurt echoes this in his thread.
I think the biggest reason to refrigerate as opposed to freeze comes with handling, and the potential for introducing water (and as a result, O2) into our solution upon re-introducing the container to room temp. If you had any atmospheric air in your bottle when you capped it, you WILL have condensate in the bottle upon thawing, even if it's left sealed until attaining room temp (though this is not so much of a consideration if the container was blanketed with inert gas).
In synthetic labs I've worked in, we only froze compounds that would benefit from having their temperature below their freezing point, or solids. Any thing else gets popped in a fridge.
Again, let me stress that the take home point is that your nicotine has a shelf life. Any hoarding beyond what you can consume in ~2-4 years may bear no fruit.
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