On Oct 4, 11:36*pm, Adrian wrote:
On 2011-10-04, Tudor Hughes wrote:

* * * Acetaldhyde boils at 20°C. *Did you mean isopentane? *Nice
little refrigerant with a melting point of -160°C and boiling at 26°C
thus having a liquid range tailor-made for Will.

I was thinking that acetaldehyde is a little more common than ispoentane,
thus probably more likely. But I like your suggestion

Adrian

I'd rather use isopentane than acetaldehyde which is awkward
'orrible stuff which chokes you. I've used gallons of isopentane in
my work and there's probably a certain amount in petrol especially in
the winter. AFAIK it's the lightest liquid (density 0.626) and
lugging 25-litre cans of it around is rather nice compared with some
substances.

Tudor Hughes, Warlingham, Surrey.