Re: freezing-resistant formaldehyde

<< Previous Message | Next Message >> (Philip Oshel)
Date:Thu, 26 Aug 1999 10:01:45 -0400
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Hi Phil,

The melting point  of a pure substance is the same as the freezing point.
The terms are interchangeable.  It depends if a substance is being heated
or cooled.  Formaldehyde has a melting point/freezing point of -92 C.

This type of information can be found in a chemistry book such as Lange's
Handbook Of Chemistry.

Rande Kline HT (ASCP)
Technical Services
EM Science (Philip Oshel) on 08/24/99 06:14:16 PM

Subject:  freezing-resistant formaldehyde


A year or so ago there was a discussion on "freeze-resistant formalin".
I've searched the archives in Histosearch to no avail. Or lots of travail,
if I read every message that comes up with freeze & formalin. None come up
with "freeze-resistant formalin".

There is such a thing sold by someone as I recall, but how good is it for
histology? EM level histology? How low can the temperature drop before
normal 37-40% formalin freezes anyway? Etc. ...

Replies by vendors directly to me are welcome.


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