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HC Flammable,
(Hydrocarbon) immiscible
with H2O
Liquefied CFHC Non-
gases (Freon) flammable,
deplete ozone
Propellant HFA Ozone
(Hydrofluoroalkane) friendly, low
v.p
Compressed N2O ,CO2
gases ,N2
354
355
Hazards of Freon , CFHC
Patient Environment
Irritation of Ozone
pharynx and depletion
bronchi
355
177
