Properties of hydrogen cyanide
Thermophysical properties for hydrogen cyanide (CAS: 74-90-8). 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: 1, N: 1
- CAS74-90-8
- FormulaCHN
- ID74-90-8
- InChICHN/c1-2/h1H
- InChI KeyLELOWRISYMNNSU-UHFFFAOYSA-N
- IUPAC Namemethanenitrile
- Molecular Weight (kg)27.0253
- Phasel
- PubChem ID768
- SMILESC#N
- Synonyms
Physical Properties
- Acentric factor0.407
- Critical pressure (bar)54
- Critical temperature (°C)183.85
- Critical volume (m³/kmol)0.135
- Dipole moment2.98
- Melting temperature (°C)-13.4
- Normal boiling temperature (°C)25.63
State-dependent Properties
- API gravity72.2835
- Compressibility factor0.00162554
- Density (kg/m³)679.551
- Dynamic viscosity (cP)0.183271
- Enthalpy of vaporization (mass) (kJ)997.235
- Enthalpy of vaporization (molar) (kJ/kmol)2.6951e+4
- Gibbs free energy (kJ/kmol)0
- Joule–Thomson coefficient-3.6872e-7
- Kinematic viscosity2.6969e-7
- Molar enthalpy (kJ/kmol)0
- Molar entropy (kJ/(kmol·K))0
- Molar heat capacity (kJ/(kmol·K))36.278
- Molar volume (m³/kmol)0.0397694
- Parachor1.4504e-5
- Poynting correction factor1.00004
- Prandtl number1.11242
- Saturation pressure (bar)0.988399
- Saturation temperature (°C)25.6619
- Solubility parameter2.4806e+4
- Specific enthalpy (kJ)0
- Specific entropy (kJ/kg·K)0
- Specific gravity0.68022
- Specific heat capacity (kJ/kg·K)1.34237
- Surface tension0.0175776
- Thermal conductivity0.221156
- Thermal diffusivity2.4244e-7
Safety Properties
- Autoignition temperature (°C)538
- Flash point temperature (°C)-20
- Lower flammability limit0.054
- Upper flammability limit0.46
Environmental Properties
- Global warming potential
- Ozone depletion potential