Alcohol · CH₄O
The simplest alcohol — a bulk feedstock, solvent, and gas-hydrate inhibitor. Feedstock for formaldehyde and MTBE, a common solvent, and injected as a hydrate inhibitor in gas pipelines.
| Formula | CH₄O |
| CAS number | 67-56-1 |
| Synonyms | methyl alcohol, wood alcohol, MeOH |
| Molar mass | 32.04 g/mol (Computed from the molecular formula and CODATA atomic weights) |
| Normal boiling point | 64.7 °C (NIST Chemistry WebBook (webbook.nist.gov)) |
| Liquid density | 792 kg/m³ (Reference liquid density near 20–25 °C (NIST WebBook)) |
Antoine equation (mmHg/°C): log₁₀(P) = 8.08097 − 1582.271 / (239.726 + T), valid 15–84 °C. Source: NIST Chemistry WebBook (webbook.nist.gov).
| °C | kPa | bar | mmHg | psia |
|---|---|---|---|---|
| 15.0 | 9.87 | 0.0987 | 74.0 | 1.431 |
| 28.8 | 20.58 | 0.2058 | 154.4 | 2.985 |
| 42.6 | 39.94 | 0.3994 | 299.6 | 5.794 |
| 56.4 | 72.88 | 0.7288 | 546.7 | 10.571 |
| 70.2 | 126.05 | 1.2605 | 945.5 | 18.282 |
| 84.0 | 208.06 | 2.0806 | 1560.6 | 30.176 |
Using its Antoine constants (NIST Chemistry WebBook (webbook.nist.gov)), the saturation pressure of methanol at 25 °C is about 16.94 kPa. Use the calculator above for any temperature within 15–84 °C.
Methanol boils at 64.7 °C at atmospheric pressure (NIST Chemistry WebBook (webbook.nist.gov)). At that temperature its vapor pressure equals one atmosphere (760 mmHg).
Methanol (CH₄O, CAS 67-56-1) has a molar mass of 32.04 g/mol.