Highhorse,
Here we go again. I just Googled "halatron fire extinguishers" and found the following, just one of many entries.
(The actual spelling is Halotron....sorry about that, but it still comes up misspelled but adds the spelling correction promt)

Supporting statements to my claim that you quoted can be found at www.halotron-inc.com/halotron1.php and many other places.

Quote: "Halotron I is a safe, effective environmentally acceptable chemicall blend based on raw material HCFC-123. It was originally introduced in 1992 to replace severe ozone depleting halon 1211, or bromochlorodifluoromethane (BFC)"

"Halotron I is approved as environmentally acceptable under the U.S. EPA's SNAP program and has undergone the most extensive testing of any halogenated clean agent for portable fire extinguishers since 1992. There are more than 30 seperate UL listings for Halotron I portable extingueshers, which is more than twice the number available with any other halocarbon-based clean agent."

Halon 1211 is still in use, but is falling out of favor because of its environmentally unfavorable characteristics.