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 |