[Akr]

Hello,
I've been searching the databases of Sigma Aldrich and ChemSpider for a while now and have no decent results.

I'm looking for a molecule which will sublime at a reasonably low temperature and which will not fragment at temperatures below 500 °C. The mass of the molecule is not terribly important but it must be reasonably large.
My original idea was a perfluoro carbon.

Thanks!

[Stepan]

Iodine, naphthalene?