Dibromomethane is used as a solvent in organic synthesis and also acts as an intermediate in the manufacture of specialty chemicals, agrochemicals, and pharmaceuticals.
CAS no: 74-95-3
Properties
Generic Properties
| Property | Value | Unit |
|---|---|---|
| Chemical Formula | CH2Br2 | - |
| Molecular Weight | 173.835 | - |
| Heat of Combustion | 3196.5 | kJ/kg |
| Boiling Point | 370.1 | K |
| Freezing Point | 220.6 | K |
| Flash Point | 307.04 | K |
| UEL | 27.2 | vol % |
Critical Properties
| Property | Value | Unit |
|---|---|---|
| Critical Temperature | 611 | K |
| Critical Pressure | 71.7 | bar |
| Critical Volume | 223 | cm3/mol |
| Critical Density | 0.7795 | g/cm3 |
| Critical Z | 0.315 | - |
| Accentric Factor | 0.21 | - |
Temperature Dependent Properties
Specific Heat
The specific heat at constant pressure can be calculated with the formula:
| Constant | Gas | Liquid | Solid |
|---|---|---|---|
| A | 28.305 | 37.728 | 6.362 |
| B | 0.10581 | 0.48154 | 0.32792 |
| C | -0.000047966 | -0.0013291 | - |
| D | -2.671E-09 | 1.5449E-06 | - |
| E | 5.1497E-12 | - | - |
| T min(K) | 100 | 222 | 191 |
| T max(K) | 1500 | 550 | 221 |
Heat of Formation
The heat of formation can be calculated with the formula:
| Constant | Value |
|---|---|
| A | -40.378 |
| B | -0.023532 |
| C | 0.00001275 |
| 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 | -12.272 | -5.4865 |
| B | 0.4946 | 863.8 |
| C | -0.000065052 | 0.0121 |
| D | - | -0.000011614 |
| T min(K) | 250 | 230 |
| T max(K) | 1000 | 611 |
Heat of Vaporization
The heat of vaporization can be calculated with the formula:
| Constant | Value |
|---|---|
| A | 48.196 |
| n | 0.377 |
| T min(K) | 220.6 |
| T max(K) | 611 |
Thermal Conductivity
The thermal conductivity can be calculated with the formula:
| Constant | Gas | Liquid |
|---|---|---|
| A | -0.0030391 | 0.1645 |
| B | 0.000025496 | -0.00014616 |
| C | 6.7633E-09 | -1.2874E-07 |
| T min(K) | 250 | 221 |
| T max(K) | 1000 | 580 |
Liquid Density
The Liquid Density can be calculated with the Equation:
| Constant | Value |
|---|---|
| A | 0.7795 |
| B | 0.2483 |
| n | 0.2758 |
| T min(K) | 220.6 |
| T max(K) | 611 |
Saturation Pressure
The Saturation Pressure can be calculated with the Antoine Equation:
| Constant | Value |
|---|---|
| A | 7.23867 |
| B | 1423.39 |
| C | 229.675 |
| T min(C) | -52.55 |
| T max(C) | 337.85 |
Diffusion Coefficient at Infinite Dilution in Water
The Diffusion Coefficient at Infinite Dilution in Water can be calculation:
| Constant | Value |
|---|---|
| A | -1.4181 |
| B | -1048.97 |
| 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 | -0.04895 |
| B | 0.00028436 |
| C | 5.9987E-07 |
| T min(K) | 200 |
| T max(K) | 1000 |