Properties of octane
Thermophysical properties for octane (CAS: 111-65-9). Use the selector below to view properties in different unit systems.
Calculation Conditions
The following state-dependent properties were calculated at these standard conditions.
Temperature
25 °C
Pressure
1.01325 bar
Need properties at a different state? Use our interactive calculator.
Open CalculatorIdentification
- AtomsC: 8, H: 18
- CAS111-65-9
- FormulaC8H18
- ID111-65-9
- InChIC8H18/c1-3-5-7-8-6-4-2/h3-8H2,1-2H3
- InChI KeyTVMXDCGIABBOFY-UHFFFAOYSA-N
- IUPAC Nameoctane
- Molecular Weight (kg)114.229
- Phasel
- PubChem ID356
- SMILESCCCCCCCC
- Synonyms
Physical Properties
- Acentric factor0.398
- Critical pressure (bar)24.8359
- Critical temperature (°C)295.59
- Critical volume (m³/kmol)0.492368
- Dipole moment0
- Melting temperature (°C)-56.85
- Normal boiling temperature (°C)125.644
State-dependent Properties
- API gravity68.6756
- Compressibility factor0.00668359
- Density (kg/m³)698.574
- Dynamic viscosity (cP)0.511531
- Enthalpy of vaporization (mass) (kJ)363.42
- Enthalpy of vaporization (molar) (kJ/kmol)4.1513e+4
- Gibbs free energy (kJ/kmol)0
- Joule–Thomson coefficient-4.2077e-7
- Kinematic viscosity7.3225e-7
- Molar enthalpy (kJ/kmol)0
- Molar entropy (kJ/(kmol·K))0
- Molar heat capacity (kJ/(kmol·K))254.459
- Molar volume (m³/kmol)0.163517
- Parachor6.2771e-5
- Poynting correction factor1.00658
- Prandtl number9.1456
- Saturation pressure (bar)0.0187345
- Saturation temperature (°C)125.644
- Solubility parameter1.5450e+4
- Specific enthalpy (kJ)0
- Specific entropy (kJ/kg·K)0
- Specific gravity0.699261
- Specific heat capacity (kJ/kg·K)2.22763
- Surface tension0.0211415
- Thermal conductivity0.124596
- Thermal diffusivity8.0066e-8
Safety Properties
- Autoignition temperature (°C)206
- Flash point temperature (°C)13
- Lower flammability limit0.008
- Upper flammability limit0.065
Environmental Properties
- Global warming potential
- Ozone depletion potential