DCHAS-L Discussion List Archive
Date: Sun, 14 Mar 2010 09:46:11 -0500
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: "Nail, John" <jnail**At_Symbol_Here**OKCU.EDU>
Subject: Re: Inactivation of Meta chloro peroxybenzoic acid
In-Reply-To: <48A020E1942E024DB0F2A6B68A1312440788CB6911**At_Symbol_Here**XEDAMAIL2.ex.ad3.ucdavis.edu>
Peroxyacids (RCO3H) are strong oxidizers; basically, they react by 'donatin
g' oxygen atoms to reducing agents
RCO3H + reducing agent --> RCO2H (a carboxylic acid) + Reducing agent + an
O atom; further chemistry may occur with the oxidized reducing agent.
Any decent reducing agent will work; one advantage of using Fe+2 ions, such
as in ferrous ammonium sulfate, is that the Fe+2 will be oxidized to Fe+3;
this should give a color change which can be used to confirm that the reac
tion occurred.
To answer the question, there may not be a 'preferred method'; there are do
zens of reagents that should work.
-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of De
bbie M. Decker
Sent: Friday, March 12, 2010 5:57 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] FW: Inactivation of Meta chloro peroxybenzoic acid
Hey all you chemists out there! I don't quite know where to begin to give
my colleague, Dexter, advice.
Ideas?
-----Original Message-----
From: Dexter
Debbie
We are using MCPBA to make some epoxides. I need to purify the MCPBA
before I use it and the wash and crystalization process leaves a
significant anoumt in solution. Usually dichloromethane. I will
obviuosly discard this solution as toxic waste but I want to deactivate
the MCPBA that remains. I have read you can use NaI , ferrous ions,
potassium hydroxide, sodium thiosulfate, etc. What in your knowledge is
the preferred method. Thanks. Dexter
-----------------------------
Debbie M. Decker, Campus Chemical Safety Officer
Environmental Health and Safety
University of California, Davis
1 Shields Ave.
Davis, CA=A0 95616
(530)754-7964/(530)752-4527 (FAX)
dmdecker**At_Symbol_Here**ucdavis.edu
Co-Conspirator to Make the World A
Better Place -- Visit www.HeroicStories.com and join the conspiracy
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