We allow the methyl butane to thaw and then reuse it. Any loss is due to minor
evaporation during the process.
Barry

rschoonh@sph.unc.edu wrote:

> We dispose of it as flammable waste.  Which means (here at least) that it
>gets
> incinerated.
>
> -- Begin original message --
>
> >
> > What does everyone recommend for the disposal of the 2-methyl butane
> > that is used as a cooling agent in snap freezing with liquid nitrogen?  The
> > tissues never contacts the liq. nitrogen only the 2-methyl butane ...
> >
> > Andrea
> >
> >
> >
> -- End original message --
>
> regards,
> Bob
> Robert Schoonhoven
> Laboratory of Molecular Carcinogenesis and Mutagenesis
> Dept. of Environmental Sciences and Engineering
> University of North Carolina
> CB#7400
> Chapel Hill, NC 27599
> Phone
> office 919-966-6343
>    Lab 919-966-6140
>    Fax 919-966-6123

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