Methylamine is a colorless gas derived from ammonia. It is the simplest primary amine. Methylamine is used as a building block for the synthesis of numerous other commercially available compounds.
CAS no: 74-89-5
Properties
Generic Properties
| Property | Value | Unit |
|---|---|---|
| Chemical Formula | CH5N | - |
| Molecular Weight | 31.058 | - |
| Heat of Combustion | 30717 | kJ/kg |
| Boiling Point | 266.82 | K |
| Freezing Point | 179.69 | K |
| Flash Point | 215.37 | K |
| Auto Ignition | 703.15 | K |
| LEL | 4.9 | vol % |
| UEL | 20.7 | vol % |
Critical Properties
| Property | Value | Unit |
|---|---|---|
| Critical Temperature | 430.05 | K |
| Critical Pressure | 74.58 | bar |
| Critical Volume | 154 | cm3/mol |
| Critical Density | 0.2017 | g/cm3 |
| Critical Z | 0.321 | - |
| Accentric Factor | 0.281 | - |
Temperature Dependent Properties
Specific Heat
The specific heat at constant pressure can be calculated with the formula:
| Constant | Gas | Liquid | Solid |
|---|---|---|---|
| A | 40.039 | 13.565 | -8.069 |
| B | -0.015108 | 0.90836 | 0.64888 |
| C | 0.00025012 | -0.0034881 | -0.0015032 |
| D | -2.334E-07 | 0.000005277 | - |
| E | 6.5582E-11 | - | - |
| T min(K) | 100 | 181 | 80 |
| T max(K) | 1500 | 387 | 175 |
Heat of Formation
The heat of formation can be calculated with the formula:
| Constant | Value |
|---|---|
| A | -7.0039 |
| B | -0.060803 |
| C | 0.000029611 |
| 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 | -4.2671 | -9.467 |
| B | 0.2865 | 982.86 |
| C | -0.000046017 | 0.0289 |
| D | - | -0.000035672 |
| T min(K) | 250 | 180 |
| T max(K) | 1000 | 430 |
Saturation Pressure
Saturation pressure can be calculated with the formula:
| Constant | Value |
|---|---|
| A | 7.36379 |
| B | 1025.4 |
| C | 235.062 |
| T min(C) | -93.46 |
| T max(C) | 156.9 |
Heat of Vaporization
The heat of vaporization can be calculated with the formula:
| Constant | Value |
|---|---|
| A | 38.656 |
| n | 0.405 |
| T min(K) | 179.69 |
| T max(K) | 430.05 |
Thermal Conductivity
The thermal conductivity can be calculated with the formula:
| Constant | Gas | Liquid |
|---|---|---|
| A | -0.0076391 | 0.2501 |
| B | 0.000065194 | 0.00011263 |
| C | 4.9249E-08 | -9.469E-07 |
| T min(K) | 250 | 180 |
| T max(K) | 1000 | 409 |
Liquid Density
The Liquid Density can be calculated with the Equation:
| Constant | Value |
|---|---|
| A | 0.2017 |
| B | 0.2141 |
| n | 0.2275 |
| T min(K) | 179.69 |
| T max(K) | 430.05 |
Diffusion Coefficient at Infinite Dilution in Water
The Diffusion Coefficient at Infinite Dilution in Water can be calculation:
| Constant | Value |
|---|---|
| A | -1.3194 |
| B | -1035.921 |
| 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 | -0.07342 |
| B | 0.00048011 |
| C | 9.4755E-07 |
| T min(K) | 200 |
| T max(K) | 1000 |