Dibromomethane is used as a solvent in organic synthesis and also acts as an intermediate in the manufacture of specialty chemicals, agrochemicals, and pharmaceuticals.

**CAS no: **74-95-3

## Properties

#### Generic Properties

Property | Value | Unit |
---|---|---|

Chemical Formula | CH2Br2 | - |

Molecular Weight | 173.835 | - |

Heat of Combustion | 3196.5 | kJ/kg |

Boiling Point | 370.1 | K |

Freezing Point | 220.6 | K |

Flash Point | 307.04 | K |

UEL | 27.2 | vol % |

#### Critical Properties

Property | Value | Unit |
---|---|---|

Critical Temperature | 611 | K |

Critical Pressure | 71.7 | bar |

Critical Volume | 223 | cm3/mol |

Critical Density | 0.7795 | g/cm3 |

Critical Z | 0.315 | - |

Accentric Factor | 0.21 | - |

### Temperature Dependent Properties

#### Specific Heat

The specific heat at constant pressure can be calculated with the formula:

Constant | Gas | Liquid | Solid |
---|---|---|---|

A | 28.305 | 37.728 | 6.362 |

B | 0.10581 | 0.48154 | 0.32792 |

C | -0.000047966 | -0.0013291 | - |

D | -2.671E-09 | 1.5449E-06 | - |

E | 5.1497E-12 | - | - |

T min(K) | 100 | 222 | 191 |

T max(K) | 1500 | 550 | 221 |

#### Heat of Formation

The heat of formation can be calculated with the formula:

Constant | Value |
---|---|

A | -40.378 |

B | -0.023532 |

C | 0.00001275 |

T min(K) | 332.62 |

T max (K) | 1000 |

#### Viscosity

The viscosity can be calculated with the formula:

For liquid

For Gas

Constant | Gas | Liquid |
---|---|---|

A | -12.272 | -5.4865 |

B | 0.4946 | 863.8 |

C | -0.000065052 | 0.0121 |

D | - | -0.000011614 |

T min(K) | 250 | 230 |

T max(K) | 1000 | 611 |

#### Heat of Vaporization

The heat of vaporization can be calculated with the formula:

Constant | Value |
---|---|

A | 48.196 |

n | 0.377 |

T min(K) | 220.6 |

T max(K) | 611 |

#### Thermal Conductivity

The thermal conductivity can be calculated with the formula:

Constant | Gas | Liquid |
---|---|---|

A | -0.0030391 | 0.1645 |

B | 0.000025496 | -0.00014616 |

C | 6.7633E-09 | -1.2874E-07 |

T min(K) | 250 | 221 |

T max(K) | 1000 | 580 |

#### Liquid Density

The Liquid Density can be calculated with the Equation:

Constant | Value |
---|---|

A | 0.7795 |

B | 0.2483 |

n | 0.2758 |

T min(K) | 220.6 |

T max(K) | 611 |

#### Saturation Pressure

The Saturation Pressure can be calculated with the Antoine Equation:

Constant | Value |
---|---|

A | 7.23867 |

B | 1423.39 |

C | 229.675 |

T min(C) | -52.55 |

T max(C) | 337.85 |

#### Diffusion Coefficient at Infinite Dilution in Water

The Diffusion Coefficient at Infinite Dilution in Water can be calculation:

Constant | Value |
---|---|

A | -1.4181 |

B | -1048.97 |

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 | -0.04895 |

B | 0.00028436 |

C | 5.9987E-07 |

T min(K) | 200 |

T max(K) | 1000 |