From: Ben Ruekberg <bruekberg**At_Symbol_Here**>
Subject: Re: [DCHAS-L] Heating tape for DMSO column
Date: Thu, 1 Oct 2015 06:31:55 -0400
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 005401d0fc34$65177740$2f4665c0$**At_Symbol_Here**

Aldrich lists the melting point of DMSO at 18.45 =B0 C, approximately 66 =B0 F. So my question is, how cold do you keep your labs?




From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**] On Behalf Of Debbie M. Decker
Sent: Wednesday, September 30, 2015 4:00 PM
Subject: [DCHAS-L] Heating tape for DMSO column




My newest researcher will be using a column purification system to purify his suite of solvents for organic synthesis.  One of those is DMSO.  It freezes at about room temperature.  He wishes to use a heating tape to keep it gooey enough to go through the column.  Here's what he's proposing to use:


I'm inclined to say go ahead, so long as he installs this column at the end of the rack and in proximity to the least flammable of the other solvents.  I=E2=80™m also wondering if he should just have it on at low temperature all the time or wait until they have a problem and then thaw it using a heat gun.  I don't like the heat gun idea, particularly, but there are also risks associated with having something heating all the time.


What do ya'll think?





Debbie M. Decker, CCHO, ACS Fellow

Chair, Division of Chemical Health and Safety

University of California, Davis





Birkett's hypothesis: "Any chemical reaction

that proceeds smoothly under normal conditions,

can proceed violently in the presence of an idiot."


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