Ahh I am glad you asked this question!
I am glad for two reasons, the first being that I have tried a number of different ways and have found the best ones that don't cost an arm and a leg
(like teflon bottles...). The second reason is I am glad you asked before you tried putting HNO3 in some unknown plastic, because this could hurt you
and ruin your HNO3!
I have found two ways that work rather well and are very cheap. Both these methods require narrow mouth Amber Reagent bottles ( around 3.00 for a
500ml one), but you may use clear though your acid will likely decompose after time. For the first method take the stopper for the bottle(it should be
ground glass) and wrap it with around 3 layers of PTFE tape, and... thats it! For the second method do the same thing but instead of PTFE tape use
vaccum grease.
Notes: In my opinion both these methods work well, but you need to be careful of how many layers of PTFE tape you use since it can make so the stopper
"float" on the rim of the bottle. Second thing is you must not fill the bottle more that 3/4 of the way! Also keep it in a fridge it will minimize
light exposure and keep vaporization down. One thing that suprised me was a while ago I had 87mls of RFNA in a 500ml amber teflon-lined reagent
bottle in the fridge, I took the acid out and unstoppered it but I noticed on the stopper there was HNO3 that had evaporated and condensed on stopper
of the flask. Moral of the storry is just because it is cold does not mean it doesnt fume anymore.
Anyway I hope this helps, and if you want tomorrow I may be able to post a picture of the bottle so you get a clearer understanding.
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