AOD
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AOD
My dad used to do A/C work on cars. I don't know about the new freon. But the old R-12 and the like when passed though a flame makes phosgene gas (spelling may be wrong) Which is a nerve gas the the Germans used in WW2. In fact if R-12 is leaking inside of the car and is inhaled though a cigarette it will turn it into a poison gas too
Billy
The newer refrigerants are still pretty nasty to burn. Instead of being a CFC they are usually an HFC, simply replacing the Chlorine atom in the molecule with a hydrogen atom. The Florine is still there, which makes it pretty nasty to burn too.
Ammonia will burn if there is enough of it, now THAT is nasty to smell.