From: "CHANDRA, Tilak" <tchandra**At_Symbol_Here**FPM.WISC.EDU>
Subject: Re: [DCHAS-L] DMF "use within 5 years"
Date: Tue, 4 Aug 2015 16:38:08 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: AC64846C6B11EE4F97DEDF3ED857D65C4630D9E9**At_Symbol_Here**
In-Reply-To <12A1D57E-5DA4-4B91-9B83-60B1ACAB3717**At_Symbol_Here**>

Hi Ralph:

For syntheses purpose, old DMF can be used after simple distillation. Good luck.



-----Original Message-----
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**] On Behalf Of Stuart, Ralph
Sent: Tuesday, August 04, 2015 10:26 AM
Subject: [DCHAS-L] DMF "use within 5 years"

During a lab inspection today, I noticed a bottle of extra pure Dimethylformamide in one of our labs that had a note on the manufacturers (Acros) label that says "use within 5 years of opening". A little Google searching doesn't seem to indicate the DMF is a peroxide former, so I wonder if anyone can shed some light on why this time limit is recommended?

The bottle was received in Jan 2011, so inquiring miles would like to know.

thanks for any insight on this.

- Ralph

Ralph Stuart CIH
Chemical Hygiene Officer
Keene State College
Keene, NH. 03431


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