We have the Thermo Fisher SpeedVac Savant SPD1010 system in our laboratory. The manufacturer recommends the use of Cryocool as heat transfer fluid to conducts heat away from the glass condensation flask, allowing vapors to condense on
the flask walls. However, we often need to add more fluid to complete the reccomended Cryocool level inside the chamber. Nevertheless, Cryocool is too expensive for us, and I would like to know if there is any solvent or solution that we can use/prepare to replace this heat transfer fluid without damage the equipament. Ethanol may be used instead? Thank you!
Nicolas,
Cryocool is a mix of siloxanes
ftp://ftp.mrn.gouv.qc.ca/Public/Drf/FichesSignaletiques/MSDS/cryocool.pdf
and I would hesitate about using a known polar solvent such as ethanol.
You could order the siloxanes in bulk from any chemical supplier and blend your own version of cryocool - or at a pinch, a commercial silicone oil with the same viscosity and density could be a good match.
Good luck getting the density and viscosity of CryoCool!
https://www.bonnymans.co.uk/products/product.php?categoryID=1419&productID=6290
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