CAS 25322-69-4: Polypropylene Glycol (PPG 400) ((C3H6O)nH2O)
Identity
| CAS Number | 25322-69-4 |
| Molecular Formula | (C3H6O)nH2O |
| IUPAC Name | polypropylene glycol |
| Molecular Weight | 400.0 g/mol |
| SMILES | CC(O)COC(C)OCC(C)O |
| Synonyms | PPG, polypropylene oxide, polyglycol P, PPG 400 |
2D Structure
Physical Properties
| Density | 1.005 g/mL at 25°C |
| Boiling Point | None°C |
| Melting Point | -40.0°C |
| Flash Point | 210.0°C |
| Vapor Pressure | 0.0 kPa at 20°C |
| Refractive Index | nD = 1.449 |
| Dielectric Constant | ε = 7.5 |
Safety & GHS Classification
Storage: Store in tightly sealed containers. Hygroscopic. Very low toxicity. Viscous liquid — warming reduces viscosity for transfer.
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 | Excellent |
| Copper | Excellent |
| Brass | Excellent |
Applications
- Polyurethane polyol production (largest use)
- Hydraulic fluid component
- Defoamer in food processing
- Cosmetics and personal care
- Lubricant and plasticizer
- Surfactant manufacturing
- Metalworking fluid
- Dielectric fluid
External References: PubChem