Benzyl alcohol boils at 205 deg C (401 deg F). In my opinion, this is not a good way to get rid of BA. If you are going to put in the oven at 450 for a few hours, I strongly suggest that you flush the vial with nitrogen or argon (do you have welding argon?). Heating it that hot in air is likely to cause some degradation due to air oxidation.
-Spidey
Spidey is a fictional character. I do not use or condone the use of illegal drugs. Any references to steroids or other illegal drugs is purely for entertainment purposes and role-playing.