Nomenclature
CAS number: 75-71-8
Difluorodichloromethane; Arcton 12 (ICI); Freon 12 (DuPont); Frigen 12 (Hoechst); Genetron 12 (AlliedSignal); Halon; Isotron 2.
CCl
2F
2; mol wt 120.91.
C 9.93%, Cl 58.64%, F 31.43%.
Description and references
Prepn: Henne, Org.
React. 2, 49 (1944); Swarts, Chem. Zentralbl. 1907, II, 581.
Manuf: Faith, Keyes & Clark's Industrial
Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience,
New York, 4th ed., 1975) pp 325-330.
Properties
Colorless, practically odorless gas. Faint, ether-like
odor in high concentrations. Stable up to 550°. dliq-29.8 1.486. mp -158°. bp760 -29.8°; bp2atm -12.2°; bp5atm 16.1°; bp10atm 42.4°; bp20atm 74.0°; bp30atm 95.6°. Critical temp 111.5°; critical pressure 39.6 atm (582 lb/sq
inch). Dipole moment 0.51. Non-flammable. Insol in water. Sol in alcohol, ether. Absorbs less than 0.0025%
water. Has little, if any, anesthetic or toxic action, but toxic
substances may be formed on contact with a flame or hot metal surface.Caution
Potential symptoms of overexposure
are dizziness, tremors, asphyxia, unconsciousness, cardiac arrhythmias
and cardiac arrest; direct contact with liquid may cause frostbite.
See NIOSH Pocket Guide to Chemical
Hazards (DHHS/NIOSH 97-140, 1997) p 96. Note: Consult latest Government regulations on use as aerosol propellant.Use
Refrigerant, aerosol propellant.