title: Tetrahydrofuran (data page)
text: # Tetrahydrofuran (data page)
  
  This page provides supplementary chemical data on tetrahydrofuran.
  
  ## Material Safety Data Sheet
  
  The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions. MSDS is available at Mallinckrodt Baker.
  
  ## Structure and properties
  
  Structure and properties :
  
  | Index of refraction, $n_D$ | 1.4040 at 25°C |
  | - | - |
  | Abbe number | ? |
  | Dielectric constant, $ε_r$ | 7.52 $ε_0$ at 22 °C |
  | Bond strength | ? |
  | Bond length | ? |
  | Bond angle | ? |
  | Magnetic susceptibility | ? |
  | Viscosity | 0.456 mPa·s at 25°C |
  
  ## Thermodynamic properties
  
  Phase behavior :
  
  | Triple point | 164.76 K (−108.39 °C), ? Pa |
  | - | - |
  | Critical point | 541 K (268 °C), 5190 kPa |
  | Std enthalpy change of fusion, $Δ_{fus}H^o$ | 8.540 kJ/mol |
  | Std entropy change of fusion, $Δ_{fus}S^o$ | 51.8 J/(mol·K) |
  | Std enthalpy change of vaporization, $Δ_{vap}H^o$ | 32 kJ/mol |
  | Std entropy change of vaporization, $Δ_{vap}S^o$ | 51.8 J/(mol·K) |
  | Solid properties ||
  | Std enthalpy change of formation, $Δ_fH^o_{solid}$ | ? kJ/mol |
  | Standard molar entropy, $S^o_{solid}$ | ? J/(mol K) |
  | Heat capacity, $c_p$ | 81.65 J/(mol K) at −108.39°C |
  | Liquid properties ||
  | Std enthalpy change of formation, $Δ_fH^o_{liquid}$ | ? kJ/mol |
  | Standard molar entropy, $S^o_{liquid}$ | 203.8 J/(mol K) |
  | Enthalpy of combustion, $Δ_cH^o$ | −2501.2 kJ/mol |
  | Heat capacity, $c_p$ | 107.4 J/(mol K) at −108.39 °C 123.9 J/(mol K) at 25°C |
  | Gas properties ||
  | Std enthalpy change of formation, $Δ_fH^o_{gas}$ | −184.2 kJ/mol |
  | Standard molar entropy, $S^o_{gas}$ | 301.7 J/(mol K) |
  | Heat capacity, $c_p$ | 76.6 J/(mol K) at 25°C |
  
  ## Vapor pressure of liquid
  
  Vapor pressure 143 mm Hg at 20°C
  
  | P in mBar | P in mBar | 9.9 | 19.5 | 36.3 | 63.9 | 107 | 173 | 268 | 402 | 586 | 831 | 1013 |
  | - | - | - | - | - | - | - | - | - | - | - | - | - |
  | T in °C | T in °C | −30 | −20 | −10 | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 66 |
  
  ## Distillation data
  
  Vapor-Liquid Equilibrium of Tetrahydrofuran/Ethanol P = 100 kPa :
  
  | BP Temp. °C | % by mole THF | % by mole THF |
  | - | - | - |
  | BP Temp. °C | liquid | vapor |
  | 78. | 0.00 | 0.00 |
  | 77.4 | 1.72 | 3.69 |
  | 76.2 | 5.36 | 11.5 |
  | 73.8 | 13.9 | 26.4 |
  | 71.0 | 26.3 | 42.8 |
  | 67.7 | 49.7 | 62.8 |
  | 67.2 | 54.3 | 65.4 |
  | 65.9 | 71.5 | 76.2 |
  | 65.4 | 85.7 | 86.5 |
  | 65.2 | 90.8 | 90.8 |
  | 65.4 | 91.8 | 91.48 |
  | 65.4 | 94.99 | 94.46 |
  | 65.5 | 98.15 | 97.9 |
  | 65.6 | 100.0 | 100.0 |
  
  ## Spectral data
  
  UV-Vis :
  
  | $λ_{max}$ | ? nm |
  | - | - |
  | Extinction coefficient, ε | ? |
  | IR ||
  | Major absorption bands | ? $cm^{−1}$ |
  | NMR ||
  | Proton NMR | |
  | Carbon-13 NMR | |
  | Other NMR data | |
  | MS ||
  | Masses of main fragments | |
  
  * view
  * Except where noted otherwise, data relate to Standard temperature and pressure.
  * Reliability of data general note.
  