From: Debbie M. Decker <dmdecker**At_Symbol_Here**UCDAVIS.EDU>
Subject: Re: [DCHAS-L] Dilute Ethidium Bromide Disposal in California
Date: Fri, 10 Aug 2018 00:04:01 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: BY1PR08MB119332B704957FE0251F5D40C8240**At_Symbol_Here**

Hi Penny:


Here's the guidance we follow as UC Davis:


Hope this helps.




Debbie M. Decker, CCHO, ACS Fellow

Past Chair, Division of Chemical Health and Safety

Councilor and Programming Co-Chair

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."




From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of Penny Manisco
Sent: Thursday, August 9, 2018 4:38 PM
Subject: [DCHAS-L] Dilute Ethidium Bromide Disposal in California


Hello All,


There seems to be varying opinion on how to dispose of very dilute solutions of ethidium bromide. The concentration in question is 0.5 micrograms/ml of buffer. By hazardous waste definition, this  would not be considered a hazardous waste, but I believe some of our California universities and colleges recommend filtration of the ethidium bromide before disposal at any concentration.


Any guidance would be very much appreciated.




Penny Manisco,
Chemical Hygiene Officer
Harvey Mudd College


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