It is a pale yellow, crystalline, volatile substance. It is occasionally used as a disinfectant. It is also known as triiodomethane and carbon triiodide.

**CAS no: **75-47-8

## Properties

#### Generic Properties

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

Chemical Formula | CHI3 | - |

Molecular Weight | 393.732 | - |

Heat of Combustion | 1476.2 | kJ/kg |

Boiling Point | 491.16 | K |

Freezing Point | 396.16 | K |

#### Critical Properties

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

Critical Temperature | 794.55 | K |

Critical Pressure | 53.12 | bar |

Critical Volume | 349.5 | cm3/mol |

Critical Density | 1.1266 | g/cm3 |

Critical Z | 0.281 | - |

Accentric Factor | 0.193 | - |

### Temperature Dependent Properties

#### Specific Heat

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

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

A | 41.552 | 68.344 | 1 |

B | 0.15326 | 0.26441 | 0.313 |

C | -0.00015543 | -0.00050865 | - |

D | 5.835E-08 | 4.9426E-07 | - |

E | 0 | - | - |

T min(K) | 298 | 406 | 149 |

T max(K) | 1000 | 643 | 328 |

#### Heat of Formation

The heat of formation can be calculated with the formula:

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

A | 116.11 |

B | 0.00096712 |

C | 2.1267E-06 |

T min(K) | 458.39 |

T max (K) | 1000 |

#### Viscosity

The viscosity can be calculated with the formula:

For liquid

For Gas

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

A | -2.0696 | -5.4562 |

B | 0.4055 | 1154.2 |

C | -0.000013231 | 0.0092 |

D | - | -6.7261E-06 |

T min(K) | 250 | 396.16 |

T max(K) | 1000 | 754.82 |

#### Saturation Pressure

Saturation pressure can be calculated with the formula:

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

A | 7.42936 |

B | 2270.36 |

C | 281.13 |

T min(C) | 137 |

T max(C) | 521.4 |

#### Heat of Vaporization

The heat of vaporization can be calculated with the formula:

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

A | 61.071 |

n | 0.38 |

T min(K) | 396.16 |

T max(K) | 794.55 |

#### Thermal Conductivity

The thermal conductivity can be calculated with the formula:

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

A | -0.00099 | 0.0847 |

B | 0.000011538 | -0.000019292 |

C | -6.7781E-11 | -7.9844E-08 |

T min(K) | 275 | 426.16 |

T max(K) | 1000 | 724.55 |

#### Liquid Density

The Liquid Density can be calculated with the Equation:

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

A | 1.1266 |

B | 0.281 |

n | 0.2857 |

T min(K) | 396.16 |

T max(K) | 794.55 |

#### Diffusion Coefficient at Infinite Dilution in Water

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

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

A | -1.5231 |

B | -1062.84 |

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 | -0.03663 |

B | 0.00019995 |

C | 4.576E-07 |

T min(K) | 200 |

T max(K) | 1000 |