It is a colorless gas and is commonly used as a propellant and refrigerant. It is also known as difluoromonochloromethane, HCFC-22, R-22, and CHClF.
CAS no: 75-45-6
Properties
Generic Properties
| Property | Value | Unit |
|---|---|---|
| Chemical Formula | CHClF2 | - |
| Molecular Weight | 86.468 | - |
| Heat of Combustion | 365.5 | kJ/kg |
| Boiling Point | 232.32 | K |
| Freezing Point | 115.73 | K |
| Flash Point | 194.8166667 | K |
| Auto Ignition | 905.37 | K |
| UEL | 26.9 | vol % |
Critical Properties
| Property | Value | Unit |
|---|---|---|
| Critical Temperature | 369.3 | K |
| Critical Pressure | 49.71 | bar |
| Critical Volume | 166 | cm3/mol |
| Critical Density | 0.5209 | g/cm3 |
| Critical Z | 0.269 | - |
| Accentric Factor | 0.219 | - |
Temperature Dependent Properties
Specific Heat
The specific heat at constant pressure can be calculated with the formula:
| Constant | Gas | Liquid | Solid |
|---|---|---|---|
| A | 20.519 | 44.503 | 15.6 |
| B | 0.14746 | 0.47737 | 0.576 |
| C | -0.00009244 | -0.0022107 | -0.00156 |
| D | 1.438E-08 | 4.5786E-06 | - |
| E | 3.4356E-12 | - | - |
| T min(K) | 100 | 117 | 30 |
| T max(K) | 1500 | 332 | 116 |
Heat of Formation
The heat of formation can be calculated with the formula:
| Constant | Value |
|---|---|
| A | -478.31 |
| B | -0.018341 |
| C | 0.000011005 |
| T min(K) | 298.15 |
| T max (K) | 1000 |
Viscosity
The viscosity can be calculated with the formula:
For liquid
For Gas
| Constant | Gas | Liquid |
|---|---|---|
| A | -9.5169 | -10.893 |
| B | 0.5038 | 979.72 |
| C | -0.00013232 | 0.0387 |
| D | - | -0.000052025 |
| T min(K) | 232 | 170 |
| T max(K) | 500 | 369 |
Heat of Vaporization
The heat of vaporization can be calculated with the formula:
| Constant | Value |
|---|---|
| A | 29.612 |
| n | 0.386 |
| T min(K) | 115.73 |
| T max(K) | 369.3 |
Thermal Conductivity
The thermal conductivity can be calculated with the formula:
| Constant | Gas | Liquid |
|---|---|---|
| A | -0.00011 | 0.2002 |
| B | 0.000016709 | -0.00022277 |
| C | 6.3391E-08 | -5.4334E-07 |
| T min(K) | 232 | 116 |
| T max(K) | 500 | 351 |
Liquid Density
The Liquid Density can be calculated with the Equation:
| Constant | Value |
|---|---|
| A | 0.5186 |
| B | 0.2661 |
| n | 0.2812 |
| T min(K) | 115.73 |
| T max(K) | 369.3 |
Saturation Pressure
The Saturation Pressure can be calculated with the Antoine Equation:
| Constant | Value |
|---|---|
| A | 7.07154 |
| B | 848.817 |
| C | 243.376 |
| T min(C) | -157.42 |
| T max(C) | 96.15 |
Diffusion Coefficient at Infinite Dilution in Water
The Diffusion Coefficient at Infinite Dilution in Water can be calculation:
| Constant | Value |
|---|---|
| A | -1.378 |
| B | -1043.67 |
| T min(K) | 274 |
| T max(K) | 394 |
Diffusion Coefficient in Air
The Diffusion Coefficient in Air can be calculated with the Equation:
| Constant | Value |
|---|---|
| A | -0.05827 |
| B | 0.00036496 |
| C | 7.049E-07 |
| T min(K) | 200 |
| T max(K) | 1000 |