Other names include 1-Isocyanatobutane, Butane, 1-isocyanato, n-butyl isocyanate, 1-Butyl isocyanate, and Isocyanic Acid Butyl Ester.

**CAS no:** 111-36-4

## Properties

#### Generic Properties

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

Chemical Formula | C5H9NO | - |

Molecular Weight | 99.133 | - |

Heat of Combustion | 25360.9 | kJ/kg |

#### Critical Properties

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

Critical Temperature | 568 | K |

Critical Pressure | 34.4 | bar |

Critical Volume | 360 | cm3/mol |

Critical Density | 0.2754 | g/cm3 |

Critical Z | 0.262 | - |

Accentric Factor | 0.415 | - |

### Temperature Dependent Properties

#### Specific Heat

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

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

A | 25.162 | 43.088 | 5 |

B | 0.31973 | 0.99802 | 0.50193 |

C | 0.0000351 | -0.0028025 | - |

D | -1.703E-07 | 3.7744E-06 | - |

E | 5.8493E-11 | - | - |

T min(K) | 298 | 266 | 149 |

T max(K) | 1100 | 478 | 250 |

#### Heat of Formation

The heat of formation can be calculated with the formula:

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

A | -99.346 |

B | -0.10944 |

C | 0.000055955 |

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 | -10.724 | -8.191 |

B | 0.2728 | 1139.5 |

C | -0.000045547 | 0.0193 |

D | - | -0.00001899 |

T min(K) | 250 | 426 |

T max(K) | 1000 | 539.6 |

#### Heat of Vaporization

The heat of vaporization can be calculated with the formula:

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

A | 56.246 |

n | 0.388 |

T min(K) | 193 |

T max(K) | 568 |

#### Thermal Conductivity

The thermal conductivity can be calculated with the formula:

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

A | -0.0090038 | 0.2072 |

B | 0.000055459 | -0.0001594 |

C | 2.8408E-08 | -2.2436E-07 |

T min(K) | 250 | 30 |

T max(K) | 1000 | 498 |

#### Liquid Density

The Liquid Density can be calculated with the Equation:

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

A | 0.2754 |

B | 0.2071 |

n | 0.412 |

T min(K) | 193 |

T max(K) | 568 |

#### Diffusion Coefficient at Infinite Dilution in Water

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

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

A | -1.5256 |

B | -1063.17 |

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 | -0.0395 |

B | 0.0002344 |

C | 5.0044E-07 |

T min(K) | 200 |

T max(K) | 1000 |