Date: Wed, 27 May 2009 13:41:01 -0700
Reply-To: Eric Clark <erclark**At_Symbol_Here**PH.LACOUNTY.GOV>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Eric Clark <erclark**At_Symbol_Here**PH.LACOUNTY.GOV>
Subject: Guanidine thiocyanate
In-Reply-To: <C3E98B533BBA314490DC0D1C18E02317095A4C72**At_Symbol_Here**pb01msx.wgipb.local>
aka [CAS 90229-46-2]
Hello All, 
Are there any special precautions regarding the disposal of guanidine 
thiocyanate solution?  If you use this compound, what is your disposal 
method?  From the MSDS it appears sewerable; but the MSDS data on the 
Incompatibility With Other Substances as Not Available.  A senior 
researcher mentioned that this compound produces toxic gas when it 
contacts bleach or other oxidizers - substances typically found in sewer 
lines of a microbiology lab - and that's what I need to check up on.  
We're talking about liter quantities **At_Symbol_Here** 50% - 60% solutions.  

Eric Clark, MS, CCHO, CHMM  
Safety Officer, Los Angeles County Public Health Lab 

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