Date: Fri, 17 Sep 2010 10:12:27 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: ILPI <info**At_Symbol_Here**ILPI.COM>
Subject: Re: Peroxide Question
In-Reply-To: <31CDAB47DAE8804085500A5498BBB79606E327CF**At_Symbol_Here**>

That would really depend on the intended use.

For example, if the material is going to be distilled or otherwise concentrated, the peroxide concentration could increase many times and rise to dangerous levels.  Any solvent with detectable levels should have to be pre-treated to remove all traces of peroxide before distillation.

If the solvent was going to be used to elute materials on an activated alumina column, then minor levels of peroxide would not concern me as they would be adsorbed on the alumina, albeit in active form.   Note, however, that if the levels were high or the quantity of solvent run through the column was large, then the alumina could contain significant levels of peroxides and have to be treated before disposal.

See my web page on peroxides for more info: ds/ref/peroxide.html

Rob Toreki

Safety Emporium - Lab & Safety Supplies featuring brand names
you know and trust.  Visit us at
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On Sep 17, 2010, at 9:17 AM, Bill Galdenzi wrote:

I have a question:   What concentration of peroxide do you folks use for your =93acceptable=94 level?   What is the basis for this level?
Thanks for your help.
Bill Galdenzi
Environmental, Health, and Safety
Boehringer-Ingelheim Pharamceuticals
(203) 778-7759

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