Thumpalumpacus
Major
I've got a couple of CTC extinguishers sitting on my filing cabinet.
Halon 1211 isn't much better - when used on a fire it breaks down into toxic gasses. The extinguishers fitted ot Cessna 172's have a warning not to use them in an enclosed area that is smaller than the cabin.
In the USAF, 1211 was only for engine fires -- open air. For computer rooms or other electronic areas, extinguishers with 1301, still required SCBAs.