In article ,
says...

Nathan Young wrote:

I was impressed at how quickly the fuel evaporated, though. Despite
getting it all over my shirt, too, there was no detectable odor ten
minutes later. If it had been auto fuel, I would still reek today.



I've noticed this too. Avgas seems to evaporate quickly, and stink much less
than automobile gasoline. After I use my GATTS jar, I can leave it out during
the rest of a pre-flight (a few minutes) then put it back in my flight bag.
When I get home, there is no detectable odor in the flight bag.

G Faris