CAS 107-21-1: Ethylene Glycol (C2H6O2)
Identity
| CAS Number | 107-21-1 |
| Molecular Formula | C2H6O2 |
| IUPAC Name | ethane-1,2-diol |
| Molecular Weight | 62.07 g/mol |
| SMILES | OCCO |
| Synonyms | 1,2-ethanediol, MEG, monoethylene glycol, antifreeze |
2D Structure
Physical Properties
| Density | 1.113 g/mL at 25°C |
| Boiling Point | 197.3°C |
| Melting Point | -12.9°C |
| Flash Point | 111.0°C |
| Vapor Pressure | 0.006 kPa at 20°C |
| Refractive Index | nD = 1.432 |
| Dielectric Constant | ε = 37.7 |
Safety & GHS Classification
Health Hazard
- H302: Harmful if swallowed
- H373: May cause damage to organs through prolonged or repeated exposure (kidneys)
Storage: Store in tightly sealed containers. Sweet taste makes it dangerous — keep away from children and animals. Ingestion of as little as 100ml can be fatal. Do not store near food.
Material Compatibility Matrix
Plastics
| Material | Rating |
|---|---|
| PTFE | Excellent |
| PVC | Good |
| PE | Good |
| PP | Excellent |
| PEEK | Excellent |
| PVDF | Excellent |
Rubbers
| Material | Rating |
|---|---|
| Viton | Good |
| NBR | Good |
| EPDM | Excellent |
| Silicone | Good |
| FKM | Good |
Metals
| Material | Rating |
|---|---|
| Stainless 316 | Excellent |
| Aluminum | Good |
| Copper | Good |
| Brass | Good |
Applications
- Automotive antifreeze and coolant (50% of production)
- PET plastic production (30% of production)
- Hydraulic brake fluid
- Heat transfer fluid
- De-icing fluid for aircraft
- Textile fiber (polyester) production
- Laboratory reagent
- Natural gas dehydration
External References: PubChem