From: Penny Manisco <pmanisco**At_Symbol_Here**G.HMC.EDU>
Subject: [DCHAS-L] Dilute Ethidium Bromide Disposal in California
Date: Thu, 9 Aug 2018 16:37:42 -0700
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
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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.
Chemical Hygiene Officer
Harvey Mudd College
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