From: Jeff Tenney <Jeff.Tenney**At_Symbol_Here**SDMYERS.COM>
Subject: Re: [DCHAS-L] ruthenium tetroxide and piranha solution
Date: Mon, 9 Sep 2013 22:30:30 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: B08465628BB05D4E9F4CD5F74ACA8F1F26019777**At_Symbol_Here**

For the Ruthenium Tetroxide we use to handle disposal by first mixing it with a Sodium Bisulfite solution in a larger container that would be used for disposal. Used about 1 teaspoon of sodium bisulfite for every 25 mL of water, 25 mL is usually enough for about 10 mL of the stain solution. This has to be done under a hood. Flush the original container several times with the Bisulfite solution.  Most MSDS listed this as the treatment for spills. Then we would lab-pack the container with the mixture for incineration. We would still label the container as an oxidizer.  You can also place the empty container in the lab pack drum for disposal, the added weight will not increase the disposal cost too much. Some people would set the container into a larger container and surround it with sodium bisulfite power and the send that off that way for disposal. I would contact you disposal facility to see if they have any specific requirements.





From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Yung Morgan
Sent: Monday, September 09, 2013 4:44 PM
Subject: [DCHAS-L] ruthenium tetroxide and piranha solution


Dear members,


Please advise on the proper handling and disposal of Ruthenium Teraoxide(0.5% in water) , the SDS literature are not too clear.  Also I would appreciate any good method to  properly handle Piranha solution.


Thank you for the great work you do.  


Best regards,


Yung Morgan, MsPH
Laboratory Safety
Industrial Hygiene Services
Environmental Health and Safety
117 Draper hall
UMASS,Amherst MA 01003
phone (413)  545-2682
Fax  (413) 545-2600
email : pmorgan**At_Symbol_Here**


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