CAS 111-46-6: Diethylene Glycol (C4H10O3)
Identity
| CAS Number | 111-46-6 |
| Molecular Formula | C4H10O3 |
| IUPAC Name | 2,2'-oxydi(ethanol) |
| Molecular Weight | 106.12 g/mol |
| SMILES | OCCOCCO |
| Synonyms | DEG, dihydroxyethyl ether, 2,2'-oxydiethanol, diglycol |
2D Structure
Physical Properties
| Density | 1.118 g/mL at 25°C |
| Boiling Point | 245.0°C |
| Melting Point | -10.0°C |
| Flash Point | 143.0°C |
| Vapor Pressure | 0.001 kPa at 20°C |
| Refractive Index | nD = 1.447 |
| Dielectric Constant | ε = 31.7 |
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. Hygroscopic. Toxic if ingested — similar kidney toxicity to ethylene glycol. Keep away from food and drinks.
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
- Natural gas dehydration (drying agent)
- Antifreeze formulation (secondary)
- Heat transfer fluid
- Textile softener and lubricant
- Unsaturated polyester resin production
- Cork and paper manufacturing
- Printing ink solvent
External References: PubChem