Originally Posted by Toddster
By 2014 there wont be anymore 'Halon' the government is recalling all Halon systems and hand held portables.
Replacing all Halon with another gas called Clean Guard or Halotron.
The old Halon is very toxic...... kind of like the old carbon tetrachloride extinguishers were discontinued back in the day.
Halon and other flourocarbons are banned because of their link to the Ozone depletion. The ban is for the manufacturer of more Halon, however; exsisting quantaties are being banked by aircraft manufacturers and owners.
Halon is not toxic. It is considered to be a safe agent, with the exception that it hurts the ozone. I've been in total flood Halon environments and the only thing the gas does is make your voice deep...in comparison to Helium which is just the opposite.
Halon used on metal fires is far from non-toxic. The gas braks down in the high heat and bonds with the gases from the burning metals and makes a phosgene based kill ya gas.
Halon can displace oxygen, but its real fire suppressive characterisits come from the bonding at the chemcial level that breaks the fire tetrahedron, and the fire goes out.