Properties of isobutyric acid
Thermophysical properties for isobutyric acid (CAS: 79-31-2). 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
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Open CalculatorIdentification
- AtomsC: 4, H: 8, O: 2
- CAS79-31-2
- FormulaC4H8O2
- ID79-31-2
- InChIC4H8O2/c1-3(2)4(5)6/h3H,1-2H3,(H,5,6)
- InChI KeyKQNPFQTWMSNSAP-UHFFFAOYSA-N
- IUPAC Name2-methylpropanoic acid
- Molecular Weight (kg)88.1051
- Phasel
- PubChem ID6590
- SMILESCC(C)C(=O)O
- Synonyms
Physical Properties
- Acentric factor0.61
- Critical pressure (bar)37
- Critical temperature (°C)331.85
- Critical volume (m³/kmol)0.29
- Dipole moment1.09
- Melting temperature (°C)-46
- Normal boiling temperature (°C)154.4
State-dependent Properties
- API gravity16.8878
- Compressibility factor0.00381469
- Density (kg/m³)944.038
- Dynamic viscosity (cP)1.2248
- Enthalpy of vaporization (mass) (kJ)404.609
- Enthalpy of vaporization (molar) (kJ/kmol)3.5648e+4
- Gibbs free energy (kJ/kmol)0
- Joule–Thomson coefficient-3.8949e-7
- Kinematic viscosity1.2974e-6
- Molar enthalpy (kJ/kmol)0
- Molar entropy (kJ/(kmol·K))0
- Molar heat capacity (kJ/(kmol·K))170.192
- Molar volume (m³/kmol)0.093328
- Parachor3.7023e-5
- Poynting correction factor1.00382
- Prandtl number16.9938
- Saturation pressure (bar)0.00184437
- Saturation temperature (°C)154.425
- Solubility parameter1.8852e+4
- Specific enthalpy (kJ)0
- Specific entropy (kJ/kg·K)0
- Specific gravity0.944967
- Specific heat capacity (kJ/kg·K)1.93169
- Surface tension0.0243906
- Thermal conductivity0.139224
- Thermal diffusivity7.6346e-8
Safety Properties
- Autoignition temperature (°C)443
- Flash point temperature (°C)58
- Lower flammability limit0.02
- Upper flammability limit0.1
Environmental Properties
- Global warming potential
- Ozone depletion potential