My laboratory uses a Histobath (from Shandon/Lipshaw or whatever they're 
called this year), a device that keeps a liquid coolant at a temperature of around 
-50 C. to freeze specimens for frozen section.

The liquid coolant we use in acetone, in a space that is not vented or 
hooded. It seems to me that this is a significant fire hazard - and we have a CAP 
inspection coming up.

Isopentane (2-methylbutane) would probably be an even worse choice. Is there 
any non-flammable liquid - perhaps a liquid Freon (halogenated hydrocarbon) 
that could be used in this system? The documentation makes no reference to the 
coolant at all.

Bob Richmond
Samurai Pathologist
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