Dichlorofluoromethane is a colorless and odorless gas generally produced by fluorination of chloroform using a catalyst such as antimony trifluoride. It was used as a propellant and refrigerant before it phased out due to its contribution to ozone depletion. It is also known as Freon 21, R 21, halomethane, and hydrochlorofluorocarbon.
CAS no: 75-43-4
Properties
Generic Properties
| Property | Value | Unit |
|---|---|---|
| Chemical Formula | CHCl2F | - |
| Molecular Weight | 102.922 | - |
| Heat of Combustion | 2229.8 | kJ/kg |
| Boiling Point | 282.05 | K |
| Freezing Point | 138.15 | K |
| Flash Point | 237.04 | K |
| Auto Ignition | 825.37 | K |
| UEL | 54.7 | vol % |
Critical Properties
| Property | Value | Unit |
|---|---|---|
| Critical Temperature | 451.58 | K |
| Critical Pressure | 51.84 | bar |
| Critical Volume | 196 | cm3/mol |
| Critical Density | 0.5251 | g/cm3 |
| Critical Z | 0.271 | - |
| Accentric Factor | 0.207 | - |
Temperature Dependent Properties
Specific Heat
The specific heat at constant pressure can be calculated with the formula:
| Constant | Gas | Liquid |
|---|---|---|
| A | 33.078 | 57.007 |
| B | 0.10473 | 0.41564 |
| C | -0.00002251 | -0.0015739 |
| D | -3.882E-08 | 2.7008E-06 |
| E | 1.8245E-11 | - |
| T min(K) | 100 | 139 |
| T max(K) | 1500 | 406 |
Heat of Formation
The heat of formation can be calculated with the formula:
| Constant | Value |
|---|---|
| A | -281.32 |
| B | -0.014952 |
| C | 9.8288E-06 |
| 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 | -3.016 | -9.3552 |
| B | 0.4202 | 974.34 |
| C | -0.000077903 | 0.0296 |
| D | - | -0.000036067 |
| T min(K) | 280 | 170 |
| T max(K) | 500 | 452 |
Heat of Vaporization
The heat of vaporization can be calculated with the formula:
| Constant | Value |
|---|---|
| A | 29.763 |
| n | 0.193 |
| T min(K) | 138.15 |
| T max(K) | 451.58 |
Thermal Conductivity
The thermal conductivity can be calculated with the formula:
| Constant | Gas | Liquid |
|---|---|---|
| A | -0.00123 | 0.1983 |
| B | 0.000018714 | -0.00024457 |
| C | 4.7235E-08 | -2.6433E-07 |
| T min(K) | 250 | 138 |
| T max(K) | 450 | 429 |
Liquid Density
The Liquid Density can be calculated with the Equation:
| Constant | Value |
|---|---|
| A | 0.5241 |
| B | 0.2711 |
| n | 0.2857 |
| T min(K) | 138.15 |
| T max(K) | 451.58 |
Saturation Pressure
The Saturation Pressure can be calculated with the Antoine Equation:
| Constant | Value |
|---|---|
| A | 7.19968 |
| B | 1118.18 |
| C | 250.007 |
| T min(C) | -135 |
| T max(C) | 178.43 |
Diffusion Coefficient at Infinite Dilution in Water
The Diffusion Coefficient at Infinite Dilution in Water can be calculation:
| Constant | Value |
|---|---|
| A | -1.4114 |
| B | -1048.076 |
| 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 | -0.05278 |
| B | 0.00032193 |
| C | 6.4149E-07 |
| T min(K) | 200 |
| T max(K) | 1000 |