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Dichlorodifluoromethane (R-12) is a colorless gas popularly known by the genericized brand name Freon (as Freon-12). It is a chlorofluorocarbon halomethane (CFC) used as a refrigerant and aerosol spray propellant .
Vapor pressure (η) at -20 °C 151 kPa Vapor pressure (η) at 0 °C 300 kPa Vapor pressure (η) at 16 °C 500 kPa Vapor pressure (η) at 20 °C 567 kPa Vapor pressure (η) at 40 °C 960 kPa Compressibility Factor (Z) at 21 °C 0.995 Viscosity (μ) at 0 °C 11.68 μPa.s (0.01168 cP) Thermal conductivity (k) at 0 °C 9.46 mW.m −1.K −1
Dichlorodifluoromethane (R-12) CF 2 Cl 2: 2.9: 120.91: 6 1: 8100 strong Vapor pressure 90 psi (6.1 atm) at 23 °C, yielding breakdown voltage 17 times higher than air at 1 atm. Higher breakdown voltages can be achieved by increasing pressure by adding nitrogen. Corrosive decomposition products. Trifluoromethane: CF 3 H: 0.8: weak 1,1,1,3,3,3 ...
Values are given in terms of temperature necessary to reach the specified pressure. Valid results within the quoted ranges from most equations are included in the table for comparison. A conversion factor is included into the original first coefficients of the equations to provide the pressure in pascals (CR2: 5.006, SMI: -0.875).
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The most common example is dichlorodifluoromethane (R-12). R-12 is also commonly called Freon and was used as a refrigerant. R-12 is also commonly called Freon and was used as a refrigerant. Many CFCs have been widely used as refrigerants , propellants (in aerosol applications), gaseous fire suppression systems, and solvents .
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