Phosgene is the organic colorless gas with an odor that resembles that of freshly cut hay. It is a poisonous gas that was used as a weapon during WW1. Additionally, it is a valued industrial building block, especially for the production of precursors of polyurethanes and polycarbonate plastics.

**CAS no: **75-44-5

## Properties

#### Generic Properties

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

Chemical Formula | CCl2O | - |

Molecular Weight | 98.915 | - |

Heat of Combustion | 1745.9 | kJ/kg |

Boiling Point | 280.71 | K |

Freezing Point | 145.37 | K |

#### Critical Properties

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

Critical Temperature | 455 | K |

Critical Pressure | 56.74 | bar |

Critical Volume | 190.2 | cm3/mol |

Critical Density | 0.52 | g/cm3 |

Critical Z | 0.285 | - |

Accentric Factor | 0.201 | - |

### Temperature Dependent Properties

#### Specific Heat

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

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

A | 20.747 | 53.075 | -2.144 |

B | 0.17972 | 0.45299 | 0.96996 |

C | -0.00023242 | -0.0016986 | -0.0036747 |

D | 1.422E-07 | 2.8257E-06 | - |

E | -3.3087E-11 | - | - |

T min(K) | 100 | 146 | 50 |

T max(K) | 1500 | 410 | 140 |

#### Heat of Formation

The heat of formation can be calculated with the formula:

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

A | -221.81 |

B | 0.0036527 |

C | -8.5257E-07 |

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 | -37.235 | -5.99 |

B | 0.5203 | 893.28 |

C | -0.000019868 | 0.0129 |

D | - | -0.000014515 |

T min(K) | 200 | 253 |

T max(K) | 900 | 455 |

#### Saturation Pressure

Saturation pressure can be calculated with the formula:

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

A | 7.13083 |

B | 1060.08 |

C | 241.87 |

T min(C) | -127.78 |

T max(C) | 181.85 |

#### Heat of Vaporization

The heat of vaporization can be calculated with the formula:

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

A | 35.61 |

n | 0.378 |

T min(K) | 145.37 |

T max(K) | 455 |

#### Thermal Conductivity

The thermal conductivity can be calculated with the formula:

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

A | -0.00442 | 0.1867 |

B | 0.000038294 | -0.000048877 |

C | 1.9223E-08 | -4.6238E-07 |

T min(K) | 250 | 145 |

T max(K) | 800 | 432 |

#### Diffusion Coefficient at Infinite Dilution in Water

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

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

A | -1.4045 |

B | -1047.161 |

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 | -0.04315 |

B | 0.00032831 |

C | 6.5366E-07 |

T min(K) | 200 |

T max(K) | 1000 |