DETERMINATION OF NITROGEN SOLUBILITY
IN SWERPRESSURIZED HFC-227ea, HFC- 236fa, AND HFC-125
Chien-Ping Chai Kao and Ralph N. Miller
E. 1. DuPont de Nemours and Company
Bromochlorofluorocarbons (halons), developed in the 1930s, have unique properties. They are low in
toxicity, nonflammable, noncorrosive, and compatible with other materials. In addition, they have therm-
odynamic and physical properties that make them ideal fire extinguishing agents and explosion suppres-
sants for protection of high-value equipment. They are used in handheld portable extinguishers, total-
flooding systems, and local application systems.
The atmospheric stability of these compounds, coupled with their bromine and/or chlorine content, has
linked them to depletion of the earth's protective ozone layer. As a result, these compounds have been
phased out of ...