EdricoRojo
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Nitric acid storage
Newbie question. I searched and didn't find any answers.
What is the best container for long term nitric acid storage?
I went through the lists of compatible materials, and tried using a plastic container of the "correct" material. Long story short, it works for short
term, not long. I was trying to store some 88% that I distilled.
I have glass beakers with taper bungs and caps. Is the proper method of sealing those with sulfuric acid? Or will that dry out over time? Or are
containers with gaskets preferable? If so, what material for the gasket?
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j_sum1
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Glass.
Acid resistant cap.
Cool.
Dark.
Typically NA is stored in amber bottles with a teflon cap. You can improvise with a reagent bottle with ground glass stopper. Alternatively be
prepared to check and replace stoppers regularly - six-monthly. You might even get away with something as crude as glass jam jars with a layer of
polyethylene between the jar and the metal cap. Check for leaks. And check cap integrity weekly at first until you know what is happening.
If you don't have an amber bottle, wrap in alfoil.
If you don't have a good stopper, then dilute to reduce the incidence of fumes. Not every application requires fuming nitric acid. Azeotropic (68%)
can be used for most things. Half that concentration is still useful.
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j_sum1
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Thread Moved
1-10-2024 at 18:03 |
EdricoRojo
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Excellent. That was what I needed to know. Thank you!
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fx-991ex
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Could he use teflon sheet for lining the cap? am curious if thats good enough(thats what i use for other less dangerous stuff).
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j_sum1
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Quote: Originally posted by fx-991ex  | | Could he use teflon sheet for lining the cap? am curious if thats good enough(thats what i use for other less dangerous stuff).
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Yes. If you have it. Teflon is great.
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Bedlasky
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Azeotropic HNO3 can be stored in glass bottle with plastic cap. Fuming nitric acid is too corrosive/oxidizing for plastic cap, groud glass joint is
practically only option. But it fumes like hell so... store it somewhere "outside" or store it for a short time.
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