Ralph et al,
From what I can recall when I used it,
the expiration date was merely a guide; I would normally impose a 3-year
limit.
Then again, I really had DMF around when
I was using it in a process, otherwise a small (500mL) was typically always
present.
But for prolonged storage "issues",
extended life would lend exposure to acids and some alkali.
At 5 years, I would dispose of it according
to local regulations, utilizing secondary containment if possible. Purifying
it would not be recommended.
Regards,
George
**************************************************
George D. McCallion, CHMT
Senior Specialist-Chemicals
VWR International, LLC
Radnor Corporate Center, Building One
Suite 200, P.O.Box 6660
100 Matsonford Road
Radnor, PA 19087
Office: 610.386.1449
Email: george.mccallion**At_Symbol_Here**vwr.com
"If you fail to plan, then you plan to fail"
**************************************************
From:
"Stuart, Ralph"
<Ralph.Stuart**At_Symbol_Here**KEENE.EDU>
To:
DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU,
Date:
08/04/2015 11:31 AM
Subject:
[DCHAS-L] DMF
"use within 5 years"
Sent by:
DCHAS-L Discussion
List <dchas-l**At_Symbol_Here**med.cornell.edu>