Thimerosal solution can meet the definition of Hazardous waste due to the mercury content.  The
amount of mercury has to calculated to determine if it meets the definition of Hazardous Waste
D009  0.2 mg/l.  Hope this helps.


"Shields, Jefry (JE)" wrote:

> Along these same lines...
>
> Does anyone know about the use of thimerosal for the same reasons at similar concentrations?
>
> Thanks in advance.
> Jefry
>
> -----Original Message-----
> From: Ralph Stuart, University of Vermont [mailto:rstuart**At_Symbol_Here**UVM.EDU]
> Sent: Friday, September 05, 2003 7:46 AM
> To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
> Subject: [DCHAS-L] Sodium azide solutions
>
> Has anyone tried to define the line between a "non-hazardous" and
> "hazardous" solution of sodium azide? The Laboratory Chemical Safety
> Summary in Prudent Practices seems to address only the solid form.
>
> We have many people using it at millimolar levels to control
> biological activity in nutrient solutions. I don't believe that this
> use presents a toxicity hazard for chemical hygiene plan purposes.
> However, the natural question is "Is it only the solid form of sodium
> azide that is potentially toxic, either acutely or chronically?" "At
> what concentration would the toxicity concern become neglible?"
>
> Thanks for any insight on this.
>
> - Ralph
> --
>
> Ralph Stuart, CIH
> Environmental Safety Manager
> University of Vermont
> Environmental Safety Facility
> 667 Spear St.
> Burlington, VT   05405
>
> rstuart**At_Symbol_Here**uvm.edu
> fax: (802)656-5407
>
> Owner:
> SAFETY list (general discussion of environmental health and safety)
> LAB-XL list (performance oriented environmental regulation of laboratories)

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