CAS 127-18-4: Tetrachloroethylene (C2Cl4)
Identity
| CAS Number | 127-18-4 |
| Molecular Formula | C2Cl4 |
| IUPAC Name | tetrachloroethene |
| Molecular Weight | 165.83 g/mol |
| SMILES | ClC(Cl)=C(Cl)Cl |
| Synonyms | perchloroethylene, PCE, perc, tetrachloroethene |
2D Structure
Physical Properties
| Density | 1.622 g/mL at 25°C |
| Boiling Point | 121.1°C |
| Melting Point | -22.0°C |
| Flash Point | None°C |
| Vapor Pressure | 1.87 kPa at 20°C |
| Refractive Index | nD = 1.506 |
| Dielectric Constant | ε = 2.3 |
Safety & GHS Classification
IrritantHealth Hazard
- H315: Causes skin irritation
- H336: May cause drowsiness or dizziness
- H351: Suspected of causing cancer
- H411: Toxic to aquatic life with long lasting effects
Storage: Store in well-ventilated area. Suspected carcinogen — minimize inhalation. Non-flammable. Do not mix with strong bases (forms toxic gases).
Material Compatibility Matrix
Plastics
| Material | Rating |
|---|---|
| PTFE | Excellent |
| PVC | Poor |
| PE | Poor |
| PP | Fair |
| PEEK | Excellent |
| PVDF | Good |
Rubbers
| Material | Rating |
|---|---|
| Viton | Excellent |
| NBR | Good |
| EPDM | Good |
| Silicone | Good |
| FKM | Excellent |
Metals
| Material | Rating |
|---|---|
| Stainless 316 | Excellent |
| Aluminum | Good |
| Copper | Good |
| Brass | Good |
Applications
- Dry cleaning solvent (60% of demand)
- Metal degreasing and cleaning
- Chemical intermediate (CFC, HFC production)
- Textile processing
- Automotive brake cleaner
- Soil remediation (contaminant extraction)
- Wood preservative
External References: PubChem