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Strage conditions for Arsenic trioxide after dissolving in NaOH - (Oct/12/2011 )

Can somone tell what is the storage condition for arsenic trioxide after dissolving in NaOH. Is it necessary to prepare freshly before every use or the stored aliquot can work??


<p>I found this on the net:</p>
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<div>Do not store above 24°C (75.2°F) as MSDS mentioned: <a href=""></a></div>
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<div>Prepare freshly before use, and store in a bottle with a ground-glass stopper.:<a href="$FILE/C3.pdf">$FILE/C3.pdf</a></div>