RE: Is isopentane safe and could it be used in -70C firdge?

From:"Smith, Allen"

The flash point is the temperature above which a flammable mixture of vapor and air forms above a flammable liquid.
I cannot find a reference for the flash point of isopentane.  The MERCK INDEX gives the flash point of n-pentane as  <-40 C.  Thus the flash point of isopentane should be below -50 C.  (I would guess -60 C.)  That suggests that leaving an open container of isopentane in a -70 C freezer would be very risky.  A 10 degree margin of safety based on GUESSWORK is not the sort of risk I would wish to run.

Allen A. Smith, Ph.D.
Barry University
School of Graduate Medical Sciences
    Podiatric Medicine and Surgery
Miami Shores, Florida  33161-6695

-----Original Message-----
From: []
Sent: Thursday, June 05, 2003 11:23 AM
Subject: Re: Is isopentane safe and could it be used in -70C firdge?

does anyone know the flash point of isopentane at -70C?

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