Properties of phosphoric acid
Thermophysical properties for phosphoric acid (CAS: 7664-38-2). 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
Need properties at a different state? Use our interactive calculator.
Open CalculatorIdentification
- AtomsH: 3, O: 4, P: 1
- CAS7664-38-2
- FormulaH3O4P
- ID7664-38-2
- InChIH3O4P/c1-5(2,3)4/h(H3,1,2,3,4)
- InChI KeyNBIIXXVUZAFLBC-UHFFFAOYSA-N
- IUPAC Namephosphoric acid
- Molecular Weight (kg)97.9952
- Phases
- PubChem ID1004
- SMILESOP(=O)(O)O
- Synonyms
Physical Properties
- Acentric factor0.41584
- Critical pressure (bar)50.7
- Critical temperature (°C)756.85
- Critical volume (m³/kmol)0.34
- Dipole moment
- Melting temperature (°C)31.175
- Normal boiling temperature (°C)407
State-dependent Properties
- API gravity18.4569
- Compressibility factor0.0038022
- Density (kg/m³)1053.46
- Dynamic viscosity (cP)0
- Enthalpy of vaporization (mass) (kJ)988.495
- Enthalpy of vaporization (molar) (kJ/kmol)9.6868e+4
- Gibbs free energy (kJ/kmol)0
- Joule–Thomson coefficient
- Kinematic viscosity
- Molar enthalpy (kJ/kmol)0
- Molar entropy (kJ/(kmol·K))0
- Molar heat capacity (kJ/(kmol·K))106.055
- Molar volume (m³/kmol)0.0930223
- Parachor5.5820e-5
- Poynting correction factor1.00427
- Prandtl number
- Saturation pressure (bar)4.6488e-9
- Saturation temperature (°C)408.812
- Solubility parameter3.0087e+4
- Specific enthalpy (kJ)0
- Specific entropy (kJ/kg·K)0
- Specific gravity1.0545
- Specific heat capacity (kJ/kg·K)1.08225
- Surface tension0.0807377
- Thermal conductivity
- Thermal diffusivity
Safety Properties
- Autoignition temperature (°C)-273.15
- Flash point temperature (°C)-273.15
- Lower flammability limit-0.312875
- Upper flammability limit0.241561
Environmental Properties
- Global warming potential
- Ozone depletion potential