It is the simplest carboxylic acid and an important intermediate in chemical synthesis. It is also known as methanoic acid.
CAS no: 64-18-6
Properties
Generic Properties
| Property | Value | Unit |
|---|---|---|
| Chemical Formula | CH2O2 | - |
| Molecular Weight | 46.026 | - |
| Heat of Combustion | 5099.5 | kJ/kg |
| Boiling Point | 373.71 | K |
| Freezing Point | 281.55 | K |
Critical Properties
| Property | Value | Unit |
|---|---|---|
| Critical Temperature | 580 | K |
| Critical Pressure | 73.9 | bar |
| Critical Volume | 125 | cm3/mol |
| Critical Density | 0.3682 | g/cm3 |
| Critical Z | 0.192 | - |
| Accentric Factor | 0.473 | - |
Temperature Dependent Properties
Specific Heat
The specific heat at constant pressure can be calculated with the formula:
| Constant | Gas | Liquid | Solid |
|---|---|---|---|
| A | 31.745 | -16.11 | -1.69 |
| B | 0.0074234 | 0.87229 | 0.41677 |
| C | 0.00018791 | -0.0023665 | -0.0006979 |
| D | -1.947E-07 | 2.4454E-06 | - |
| E | 5.7613E-11 | - | - |
| T min(K) | 50 | 283 | 100 |
| T max(K) | 1500 | 522 | 275 |
Heat of Formation
The heat of formation can be calculated with the formula:
| Constant | Value |
|---|---|
| A | -371.01 |
| B | -0.031111 |
| C | 0.000018988 |
| 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 | -15.488 | -4.2125 |
| B | 0.3737 | 979.53 |
| C | -0.000062628 | 0.0056 |
| D | - | -5.7723E-06 |
| T min(K) | 250 | 281 |
| T max(K) | 1000 | 580 |
Heat of Vaporization
The heat of vaporization can be calculated with the formula:
| Constant | Value |
|---|---|
| A | 5.5139 |
| n | -1.338 |
| T min(K) | 281.45 |
| T max(K) | 373.71 |
Thermal Conductivity
The thermal conductivity can be calculated with the formula:
| Constant | Gas | Liquid |
|---|---|---|
| A | -0.0072199 | 0.2663 |
| B | 0.000052716 | 0.00021018 |
| C | 2.8989E-08 | -6.1017E-07 |
| T min(K) | 250 | 282 |
| T max(K) | 1000 | 551 |
Liquid Density
The Liquid Density can be calculated with the Equation:
| Constant | Value |
|---|---|
| A | 0.3682 |
| B | 0.243 |
| n | 0.2366 |
| T min(K) | 281.55 |
| T max(K) | 580 |
Diffusion Coefficient at Infinite Dilution in Water
The Diffusion Coefficient at Infinite Dilution in Water can be calculation:
| Constant | Value |
|---|---|
| A | -0.9145 |
| B | -1163.861 |
| 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 | -0.05114 |
| B | 0.00041993 |
| C | 8.8798E-07 |
| T min(K) | 200 |
| T max(K) | 1000 |