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, nD	1.4040 at 25°C
Abbe number	?
Dielectric constant, εr[1]	7.52 ε0 at 22 °C
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Viscosity[1]	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, ΔfusHo	8.540 kJ/mol
Std entropy change of fusion, ΔfusSo	51.8 J/(mol·K)
Std enthalpy change of vaporization, ΔvapHo	32 kJ/mol
Std entropy change of vaporization, ΔvapSo	51.8 J/(mol·K)
Solid properties
Std enthalpy change of formation, ΔfHosolid	? kJ/mol
Standard molar entropy, Sosolid	? J/(mol K)
Heat capacity, cp[2]	81.65 J/(mol K) at −108.39°C
Liquid properties
Std enthalpy change of formation, ΔfHoliquid	? kJ/mol
Standard molar entropy, Soliquid	203.8 J/(mol K)
Enthalpy of combustion, ΔcHo	−2501.2 kJ/mol
Heat capacity, cp[2]	107.4 J/(mol K) at −108.39 °C 123.9 J/(mol K) at 25°C
Gas properties
Std enthalpy change of formation, ΔfHogas	−184.2 kJ/mol
Standard molar entropy, Sogas	301.7 J/(mol K)
Heat capacity, cp	76.6 J/(mol K) at 25°C

Vapor pressure of liquid

Vapor pressure 143 mm Hg at 20°C^[1]

P in mBar[3]		9.9	19.5	36.3	63.9	107	173	268	402	586	831	1013
T in °C		−30	−20	−10	0	10	20	30	40	50	60	66

log₁₀ Tetrahydrofuran vapor pressure. Uses formula: ${\displaystyle \scriptstyle \log _{e}P_{mmHg}=}$${\displaystyle \scriptstyle \log _{e}({\frac {760}{101.325}})-9.608804\log _{e}(T+273.15)-{\frac {6339.983}{T+273.15}}+78.35769+8.183476\times 10^{-06}(T+273.15)^{2}}$ obtained from CHERIC^[4]

Distillation data

Vapor-Liquid Equilibrium of Tetrahydrofuran/Ethanol[5] P = 100 kPa
BP Temp. °C	% by mole THF
	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
λmax	? nm
Extinction coefficient, ε	?
IR
Major absorption bands	? cm−1
NMR
Proton NMR
Carbon-13 NMR
Other NMR data
MS
Masses of main fragments

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• Except where noted otherwise, data relate to Standard temperature and pressure.
• Reliability of data general note.