nerdalert226
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KOH vs glass bottles
Would a .9 molar solution of KOH be a danger to my Borosilicate amber glass bottles?
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Pyridinium
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After a while, any strongly alkaline solution will attack the glass and probably freeze shut the glass joint. It's just a matter of how long. KOH
doesn't seem to attack glass as quickly, though.
This question was debated in
http://www.sciencemadness.org/talk/viewthread.php?tid=15633
from my own experience I've found rings of white (devitrification) in glass just from leaving sodium carbonate solutions in it for a few weeks. You
probably wouldn't notice that looking through an amber bottle, though.
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mycotheologist
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Are you talking about storing KOH solution in glass bottles? If so, I'd say HDPE containers is a better option. I know that HDPE resists concentrated
NH3 solutions very well and I assume the same goes for alkali metal hydroxides. I've had a HDPE bottle of LiOH solution in my lab for a couple of
weeks now and there are no signs of a reaction occurring.
[Edited on 10-5-2012 by mycotheologist]
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GreenD
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a .9 molar should be fine for glass itself, its not going to seep through it or deform it dramatically, but it will interact with the surface.
The only problem is do not use it with a glass-joint stoppered bottle.
I was dealing with a highly basic separation in a funnel, didn't wash the glass stopper well and now I can't even use the dang thing until I get a
torch and flame heat the glass, which itself is a bad idea.
ʃ Ψ*Ψ
Keepin' it real.
Check out my new collaborated site: MNMLimpact.com
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