Posted by Steve@Advance on January 31, 2017 at 05:04:57 from (24.182.105.179):
In Reply to: Cautionary tale posted by Harold Melius on January 30, 2017 at 21:59:29:
The chlorinated cleaners are the ones that make phosgene gas. The cleaner itself is not flamable, but the propellant in the can, usually propane, is flammable. That can be very misleading when using it around an ignition source, as in cleaning an electric motor.
The phosgene gas is created when the solvent is exposed to high temperatures or fire. The single poof of fire you experienced wasn't likely enough to cause harm from the gas, but could have started a larger fire, or as happened, some singed eyebrows. What was actually burning (if it was chlorinated cleaner) was the propellant.
What can cause poisoning though is using brake cleaner for locating vacuum leaks, or spraying into a running engine. The exhaust then becomes the source of the phosgene gas. So can using chlorinated solvent in a room with a heater, get the solvent hot enough or exposed to flame and the gas forms. You will know it when it happens! Takes your breath away, you need to breathe but your body says "no you ain't"!
As for the flammable cleaners, like carb cleaner, they don't make any toxic gasses, nothing more hazardous than carbon monoxide similar to burning gas or diesel. The danger is the flammability, similar to gasoline.
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