Craftmaster,
Your information is inaccurate and dated.
Carbon tet was used in various extinguishing agents, and was part of the propellant in various Halon extinguishers some time ago. It's a hazardous material, and one significant property lead to it's demise in extinguishers quite a few years ago. Carbon tet in the presence of heat forms phosgene gas, which is lethal. Phosgene gas is better known as a chemical weapon used in WW1 and WWII.
Carbon tetrachloride was used in early fire extinguishers (early 1900's), but was dangerous and fell out of favor, losing ground to other preferable agents. Today, it's not used for firefighting. Carbon tet extinguishers fell into disuse in the 50's. An interesting innovation of carbon tet use was the grenade system, which used a glass or frangible globe containing tet which was thrown into a fire. These were early 1900's innovations, also long outof disuse. They make great museum pieces, if you can find them.
A few years ago, numerous extinguishers were still available using old stock which did provide hazardous byproducts in a fire, including some use of carbon tet. This isn't the case now. A thread that's several years old addressed some of these hazards on this site; I won't bother retyping my comments there:
http://www.pprune.org/dg-p-general-a...inguisher.html
For now, the discussion touches on the use of halon on a lithium fire. The FAA determined that halon wasn't particularly effective on a lithium battery fire. The FAA did not determine that halon increased or worsened the fire, as it does not.
Your comments in the thread thus far are ill informed and misleading.