Let me tell you a little story:
About 20 years ago was flying a Lear 35 from FLL - CUN at night.
We had prist onboard back in the luggage area. We were talking enroute and slowly began to realize that we slurring our words. We donned our O2 masks after realizing there was a strong chemical odor coming from the back.
To make a long story short, one of the cans had discharged it's contents and we were the victims of near-incapacitation.
What is particularily nasty about prist? The propellant is ETHER!
Don't carry it in the cabin.....