Crypto
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Drying Sodium Hydroxide
Any thoughts on drying hardware store bought NaOH ?
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alexleyenda
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I guess heating it to 130°C and letting it cool in a dessicator should get the job done.
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UnintentionalChaos
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Don't bother, the only good way to dry it is to heat it while molten after which you still have to grind it up again. Most uses of sodium hydroxide
will tolerate a few percent of water. You're better off titrating it and adjusting the amount used. Most preps will also tolerate excess and 5-10%
excess should cover for any water content.
Department of Redundancy Department - Now with paperwork!
'In organic synthesis, we call decomposition products "crap", however this is not a IUPAC approved nomenclature.' -Nicodem
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ScienceSquirrel
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If it is little dry white pellets or flakes I guess it is at least 95%, probably more.
I buy 98% food grade sodium hydroxide as mini pellets for use in brewery cleansing from an approved brewery supplier.
It is a free flowing solid that does not stick together if kept dry.
Things to look out for are sticking together or white efflorescence.
This shows the absorption of water and / or carbon dioxide.
Molten sodium hdroxide is evil stuff and best avoided.
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