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Subject: Re: Flash column chromatography

Date: Jun 18, 2009 11:11 UTC

Author: List Moderator <ecgrants**At_Symbol_Here**UVM.EDU>

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Subject: Re: safe disposal of NaOH in THF

Date: Jun 18, 2009 14:40 UTC

Author: RJ <rj**At_Symbol_Here**STREM.COM>

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From: Dr. Jay A. Young <chemsafety**At_Symbol_Here**VERIZON.NET>

Subject: Re: safe disposal of NaOH in THF

Date: Jun 18, 2009 14:40 UTC

Reply-To: "Dr. Jay A. Young"

In-Reply-To:  

Demystify: 

Date: Thu, 18 Jun 2009 10:40:04 -0400
Reply-To: "Dr. Jay A. Young" <chemsafety**At_Symbol_Here**VERIZON.NET>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Dr. Jay A. Young" <chemsafety**At_Symbol_Here**VERIZON.NET>
Subject: Re: safe disposal of NaOH in THF
Comments: To: Koster Sandra K

Sandra,
 
Your friend has already conducted a test for peroxides in that THF and the result was affirmative!
 
That is, whenever you are concerned about the possible existence of peroxides in a peroxide former (such as THF, for example), your concern in and of itself is POSITIVE PROOF that it does contain peroxides and MUST be handled and disposed of accordingly.  There is no need to perform any chemical testing.
 
Jay Young
********************************
----- Original Message -----
From: Koster Sandra K
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Sent: Wednesday, June 17, 2009 3:55 PM
Subject: [DCHAS-L] safe disposal of NaOH in THF

I have a colleague who needs to dispose of NaOH (about 1M) in 50:50 THF/water which has turned orange after 1-2 years.  Any thoughts?  For example will a peroxide test be accurate in the presence of the NaOH?  Would it be safe to neutralize the NaOH? 

Thanks,

Sandra Koster

University of Wisconsin-La Crosse

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