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 |