On Wed, 20 Dec 2006 10:44:21 -0600, "Fredo" <fredo@hotmail.com> wrote:

> What sort of vacuum pressure can typical lab glassware handle?

  I routinely do rotary evaporation in 3 liter round bottom flasks at
3 torr.     Smaller glassware will handle lower vacuum.    A 1 liter
RB without scratches can be used at 100 mM Hg.