CAS 111-65-9: Octane (C8H18)
Identity
| CAS Number | 111-65-9 |
| Molecular Formula | C8H18 |
| IUPAC Name | octane |
| Molecular Weight | 114.23 g/mol |
| SMILES | CCCCCCCC |
| Synonyms | n-octane, normal octane, octyl hydride |
2D Structure
Physical Properties
| Density | 0.703 g/mL at 25°C |
| Boiling Point | 125.7°C |
| Melting Point | -56.8°C |
| Flash Point | 13.0°C |
| Vapor Pressure | 1.5 kPa at 20°C |
| Refractive Index | nD = 1.398 |
| Dielectric Constant | ε = 1.95 |
Safety & GHS Classification
FlammableIrritantHealth HazardGHS09
- H225: Highly flammable liquid and vapor
- H304: May be fatal if swallowed and enters airways
- H315: Causes skin irritation
- H336: May cause drowsiness or dizziness
- H410: Very toxic to aquatic life with long lasting effects
Storage: Store in cool, well-ventilated area. Keep away from heat, sparks, and open flames. Ground/bond containers. Use explosion-proof equipment.
Material Compatibility Matrix
Plastics
| Material | Rating |
|---|
| PTFE | Excellent |
| PVC | Poor |
| PE | Good |
| PP | Good |
| PEEK | Excellent |
| PVDF | Good |
Rubbers
| Material | Rating |
|---|
| Viton | Severe Effect |
| NBR | Severe Effect |
| EPDM | Severe Effect |
| Silicone | Poor |
| FKM | Severe Effect |
Metals
| Material | Rating |
|---|
| Stainless 316 | Excellent |
| Aluminum | Excellent |
| Copper | Excellent |
| Brass | Excellent |
Applications
- Gasoline fuel component (octane rating standard)
- Laboratory non-polar solvent
- Petrochemical refining standard
- Paint and coating solvent
- Rubber and polymer solvent
- Calibration standard for analytical instruments
External References: PubChem
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