Properties of methane
Thermophysical properties for methane (CAS: 74-82-8). 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: 1, H: 4
- CAS74-82-8
- FormulaCH4
- ID74-82-8
- InChICH4/h1H4
- InChI KeyVNWKTOKETHGBQD-UHFFFAOYSA-N
- IUPAC Namemethane
- Molecular Weight (kg)16.0425
- Phaseg
- PubChem ID297
- SMILESC
- Synonyms
Physical Properties
- Acentric factor0.01142
- Critical pressure (bar)45.992
- Critical temperature (°C)-82.586
- Critical volume (m³/kmol)0.0986278
- Dipole moment0
- Melting temperature (°C)-182.4
- Normal boiling temperature (°C)-161.483
State-dependent Properties
- Compressibility factor1
- Density (kg/m³)0.65572
- Dynamic viscosity (cP)0.0110762
- Enthalpy of vaporization (mass) (kJ)0
- Enthalpy of vaporization (molar) (kJ/kmol)0
- Gibbs free energy (kJ/kmol)0
- Joule–Thomson coefficient2.4525e-13
- Kinematic viscosity1.6892e-5
- Molar enthalpy (kJ/kmol)0
- Molar entropy (kJ/(kmol·K))0
- Molar heat capacity (kJ/(kmol·K))35.7085
- Molar volume (m³/kmol)24.4654
- Parachor
- Poynting correction factor
- Prandtl number0.7222
- Saturation pressure (bar)3815.72
- Saturation temperature (°C)-161.483
- Solubility parameter
- Specific enthalpy (kJ)0
- Specific entropy (kJ/kg·K)0
- Specific gravity0.553612
- Specific heat capacity (kJ/kg·K)2.22587
- Surface tension0
- Thermal conductivity0.0341377
- Thermal diffusivity2.3389e-5
Safety Properties
- Autoignition temperature (°C)600
- Flash point temperature (°C)-273.15
- Lower flammability limit0.044
- Upper flammability limit0.17
Environmental Properties
- Global warming potential72
- Ozone depletion potential
Failed Properties:
- API gravityFailed