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Mixture of 1-propanol, (propyl alcohol) becomes viscous at about -90. You
can use this down to -115 deg C. Relatively non toxic compared with some
other solvents. Since it doesn't form a slush, the exact temp should be
measured.
As with other solvents, cool down with liquid nitrogen.
>
>I wonder if someone can provide me with information on slushes,
>mixtures etc. to cool down a cold trap to -100 C, give or take 10?
>
>Thank you very much indeed.
>
>
>Regards,
>
> Wolfram
>
>*****************************************************
>Dr. W. Meier-Augenstein
>Hon. Lecturer in Chemistry
>
>University of Dundee, Dept. of Anatomy & Physiology,
>Small's Wynd, DUNDEE DD1 4HN, United Kingdom
>
>Tel.: +44-(0)1382-34/5124, /4968
> +44-(0)468 -314563
>Fax: +44-(0)1382-34/5514
>
>e-mail: [log in to unmask]
>
>URL: http://www.dundee.ac.uk/AnatPhys/wolfram.htm
>*****************************************************
-----------------------------------------------------
Bob Fifer
Benedum Stable Isotope Laboratory
Brown University Geological Sciences
Box 1846
Providence, RI 02912
Phone: 401-863-1698 E-mail: [log in to unmask]
Fax: 401-863-2058
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