C₂H₅OH
Compound · Organic
Ethanol
乙醇 (酒精)
Ethanol (乙醇 (酒精)), formula C₂H₅OH, is a organic with a molar mass of 46.07 g/mol (CAS 64-17-5). Colourless volatile liquid with a characteristic smell; miscible with water in all proportions.
Key facts
| Molar mass | 46.07 g/mol |
|---|---|
| Category | Organic |
| State at 25°C | Liquid |
| CAS | 64-17-5 |
Structure
CH₃–CH₂–OH
An alcohol bearing a hydroxyl –OH group
Physical properties
| Appearance | Colourless volatile liquid with a characteristic smell |
|---|---|
| Melting point | −114 °C |
| Boiling point | 78 °C |
| Density | 0.79 g/cm³ |
| Solubility | Miscible with water in all proportions |
Key reactions
C₂H₅OH + 3O₂ →(点燃) 2CO₂ + 3H₂O
Complete combustion releasing heat
2C₂H₅OH + 2Na → 2C₂H₅ONa + H₂↑
Reacts with sodium, releasing hydrogen
CH₃COOH + C₂H₅OH ⇌ CH₃COOC₂H₅ + H₂O
Esterification with acetic acid
Main uses
- Beverages and disinfection (75%)
- Fuel and gasohol
- Solvent and chemical feedstock
Hazard
ModerateFlammable; excessive intake is harmful
Constituent elements
Data sources
Molar mass is computed from IUPAC (CIAAW) standard atomic weights; formula, properties and reactions can be verified on PubChem, NIST and Wikipedia. The CAS number is the substance's unique registry identifier. Educational reference only.