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

Hiii,
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??

-sssss-

<p>hiii,</p>
<p>I found this on the net:</p>
<p> </p>
<p> </p>
<div>Do not store above 24°C (75.2°F) as MSDS mentioned: <a href="http://www.sciencelab.com/msds.php?msdsId=9927087">http://www.sciencelab.com/msds.php?msdsId=9927087</a></div>
<div> </div>
<div>Prepare freshly before use, and store in a bottle with a ground-glass stopper.:<a href="http://www.ffcr.or.jp/zaidan/FFCRHOME.nsf/7bd44c20b0dc562649256502001b65e9/07f20a2e1404f8e449256f32001bbb35/$FILE/C3.pdf">http://www.ffcr.or.jp/zaidan/FFCRHOME.nsf/7bd44c20b0dc562649256502001b65e9/07f20a2e1404f8e449256f32001bbb35/$FILE/C3.pdf</a></div>

-akhshik-