It is an organobromine compound. It is a colorless, odorless, nonflammable gas is produced both industrially and biologically. It is used as a pesticide before the 2000s. It is also known as bromomethane.
CAS no: 74-83-9
Properties
Generic Properties
| Property | Value | Unit |
|---|---|---|
| Chemical Formula | CH3Br | - |
| Molecular Weight | 94.939 | - |
| Heat of Combustion | 7405.3 | kJ/kg |
| Boiling Point | 276.71 | K |
| Freezing Point | 179.55 | K |
Critical Properties
| Property | Value | Unit |
|---|---|---|
| Critical Temperature | 467 | K |
| Critical Pressure | 80 | bar |
| Critical Volume | 156 | cm3/mol |
| Critical Density | 0.6086 | g/cm3 |
| Critical Z | 0.321 | - |
| Accentric Factor | 0.192 | - |
Temperature Dependent Properties
Specific Heat
The specific heat at constant pressure can be calculated with the formula:
| Constant | Gas | Liquid | Solid |
|---|---|---|---|
| A | 29.146 | 56.462 | -2.906 |
| B | 0.024374 | 0.49612 | 0.81876 |
| C | 0.00010655 | -0.0017627 | -0.002792 |
| D | -1.132E-07 | 2.5993E-06 | - |
| E | 3.3241E-11 | - | - |
| T min(K) | 100 | 181 | 15 |
| T max(K) | 1500 | 420 | 168 |
Heat of Formation
The heat of formation can be calculated with the formula:
| Constant | Value |
|---|---|
| A | -43.953 |
| B | -0.036719 |
| C | 0.000016872 |
| 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 | -27.74 | -9.5533 |
| B | 0.559 | 1030.6 |
| C | -0.000070942 | 0.0283 |
| D | - | -0.00003192 |
| T min(K) | 260 | 193 |
| T max(K) | 440 | 467 |
Heat of Vaporization
The heat of vaporization can be calculated with the formula:
| Constant | Value |
|---|---|
| A | 32.009 |
| n | 0.308 |
| T min(K) | 179.47 |
| T max(K) | 467 |
Thermal Conductivity
The thermal conductivity can be calculated with the formula:
| Constant | Gas | Liquid |
|---|---|---|
| A | -0.00421 | 0.1763 |
| B | 0.000027182 | -0.00013013 |
| C | 3.9758E-08 | -3.4422E-07 |
| T min(K) | 273 | 209.55 |
| T max(K) | 825 | 397 |
Liquid Density
The Liquid Density can be calculated with the Equation:
| Constant | Value |
|---|---|
| A | 0.6086 |
| B | 0.2629 |
| n | 0.2803 |
| T min(K) | 179.55 |
| T max(K) | 467 |
Diffusion Coefficient at Infinite Dilution in Water
The Diffusion Coefficient at Infinite Dilution in Water can be calculation:
| Constant | Value |
|---|---|
| A | -1.3587 |
| B | -1041.119 |
| 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 | -0.06048 |
| B | 0.00036277 |
| C | 7.2044E-07 |
| T min(K) | 200 |
| T max(K) | 1000 |