From: Dave Einolf <dave**At_Symbol_Here**ENDEAVOUREHS.COM>
Subject: Re: [DCHAS-L] Proper disposal of N-ethylmaleimide & 3-nitrophenolic
Date: February 27, 2012 12:51:29 PM EST
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <6F431C2EE2F38D459F5DD28C5B9A10BC0B9EB26A**At_Symbol_Here**>

Wayne (and all others):


Please remember that the definition of hazardous waste in California is significantly different than that at the federal level.  While Tilak’s advice may be pertinent in other jurisdictions, you can not dispose of ANYTHING in California without completing an assessment of the waste’s characteristics in accordance with 22 CCR Chapter 11.  I suggest you obtain a copy of chapter 11 ( and become intimately familiar with Article 3.  There are very good reasons why colleges and universities in California have absolute bans on disposal from their laboratories. 





Dave Einolf

Managing Director

Endeavour EHS, LLC




From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of CHANDRA, Tilak
Sent: Monday, February 27, 2012 9:29 AM
Subject: Re: [DCHAS-L] Proper disposal of N-ethylmaleimide & 3-nitrophenolic


Hi Wayne:


If the concentration is in micro molar in buffers, those chemicals can go  to the sink. If those chemicals are mixed with the organic solvents, treat them as a hazardous waste.





Tilak Chandra, Ph.D.
Chemical Safety Specialist
Environment, Health and Safety
University of Wisconsin-Madison
30 East Campus Mall
Madison, WI 53715
Ph. 608-890-0255
FAX 608-262-6767


From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Wayne Phan
Sent: Monday, February 27, 2012 10:35 AM
Subject: [DCHAS-L] Proper disposal of N-ethylmaleimide & 3-nitrophenolic


Dear all,


One of our labs will be using N-ethylmaleimide & 3-nitrophenolic acid in tiny quantities, less than  mmol.  Should we treat this as hazardous chemical waste or could we pour them down the sink?





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