CAS 64-19-7: Acetic Acid (C2H4O2)
Identity
| CAS Number | 64-19-7 |
| Molecular Formula | C2H4O2 |
| IUPAC Name | ethanoic acid |
| Molecular Weight | 60.05 g/mol |
| SMILES | CC(=O)O |
| Synonyms | ethanoic acid, glacial acetic acid, vinegar acid, AcOH |
2D Structure
Physical Properties
| Density | 1.049 g/mL at 25°C |
| Boiling Point | 117.9°C |
| Melting Point | 16.6°C |
| Flash Point | 39.0°C |
| Vapor Pressure | 1.6 kPa at 20°C |
| Refractive Index | nD = 1.372 |
| Dielectric Constant | ε = 6.2 |
Safety & GHS Classification
FlammableGHS05
- H226: Flammable liquid and vapor
- H314: Causes severe skin burns and eye damage
- H315: Causes skin irritation
Storage: Store glacial acetic acid away from ignition sources. Freezes at 16.6°C — thaw before use. Keep away from strong oxidizers. Use in well-ventilated area. Corrosive to many metals.
Material Compatibility Matrix
Plastics
| Material | Rating |
|---|---|
| PTFE | Excellent |
| PVC | Good |
| PE | Good |
| PP | Excellent |
| PEEK | Excellent |
| PVDF | Good |
Rubbers
| Material | Rating |
|---|---|
| Viton | Fair |
| NBR | Poor |
| EPDM | Good |
| Silicone | Fair |
| FKM | Fair |
Metals
| Material | Rating |
|---|---|
| Stainless 316 | Excellent |
| Aluminum | Good |
| Copper | Fair |
| Brass | Fair |
Applications
- Vinegar production (4-8% solution)
- Chemical intermediate (vinyl acetate, acetic anhydride)
- Pharmaceutical synthesis
- Textile dyeing and finishing
- Rubber coagulant
- Food preservative (E260)
- Laboratory solvent and titrant
External References: PubChem