This page provides supplementary chemical data on diethyl ether .
Material Safety Data Sheet The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the Material Safety Datasheet (MSDS ) for this chemical from a reliable source such as , and follow its directions. MSDS for diethyl ether is available at .
Structure and properties Structure and properties Index of refraction , n D1.3497 at 24.8 °C Abbe number ? Dielectric constant , εr4.34 ε0 at 20 °C 8.1 ε0 at –64 °C 10.4 ε0 at –116 °C Bond strength ? Bond length ? Bond angle ? Magnetic susceptibility ? Surface tension 17.0 dyn/cm at 20 °C Viscosity 0.2950 mP·s at 0 °C 0.2681 mP·s at 10 °C 0.2448 mP·s at 20 °C 0.2230 mP·s at 30 °C
Thermodynamic properties Phase behavior Triple point 156.92 K (–116.23 °C), ? Pa Critical point 467 K (194 °C), 3600 kPa Std enthalpy change of fusion , ΔfusH o7.19 kJ/mol Std entropy change of fusion , ΔfusS o46.6 J/(mol·K) Std enthalpy change of vaporization , ΔvapH o27.530 kJ/mol at 11.85 °C 27.247 kJ/mol at 22.48 °C Std entropy change of vaporization , ΔvapS o96.60 J/(mol·K) at 12° Solid properties Std enthalpy change of formation , ΔfH osolid? kJ/mol Standard molar entropy , S osolid? J/(mol K) Heat capacity , cp ? J/(mol K) Liquid properties Std enthalpy change of formation , ΔfH oliquid–271.2 kJ/mol Standard molar entropy , S oliquid253.5 J/(mol K) Enthalpy of combustion , ΔcH o–2726.3 kJ/mol Heat capacity , cp 172.0 J/(mol K) Gas properties Std enthalpy change of formation , ΔfH ogas–252.7 kJ/mol Standard molar entropy , S ogas342.2 J/(mol K) Heat capacity , cp 119.46 J/(mol K) at 25 °C van der Waals' constants a = 1761 L2 kPa/mol2 b = 0.1344 liter per mole
Vapor pressure of liquid P in mm Hg 1 10 40 100 400 760 1520 3800 7600 15200 30400 45600 T in °C –74.3 –48.1 –27.7 –11.5 17.9 34.6 56.0 90.0 122.0 156.0 — —
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.
log10 of Diethyl Ether vapor pressure. Uses formula: log e P m m H g = {\displaystyle \scriptstyle \log _{e}P_{mmHg}=}log e ( 760 101.325 ) − 12.4379 log e ( T + 273.15 ) − 6340.514 T + 273.15 + 95.14704 + 1.412918 × 10 − 05 ( T + 273.15 ) 2 {\displaystyle \scriptstyle \log _{e}({\frac {760}{101.325}})-12.4379\log _{e}(T+273.15)-{\frac {6340.514}{T+273.15}}+95.14704+1.412918\times 10^{-05}(T+273.15)^{2}} obtained from CHERICDistillation data BP Temp. °C % by mole ether Vapor-liquid Equilibrium for Diethyl Ether/Methanol P = 700 mmHgliquid vapor 55.98 3.90 25.16 51.78 7.32 38.58 50.00 9.24 43.84 48.95 10.84 47.73 46.20 14.02 54.04 45.70 14.81 55.30 42.25 21.30 63.51 41.65 21.74 64.43 41.15 23.83 65.74 39.90 33.87 72.47 39.45 29.24 69.58 38.40 33.17 71.72 33.40 60.85 83.07 32.90 77.07 86.59 32.48 82.84 88.57 32.02 97.70 97.66 30.50 95.02 94.58
Spectral data UV-Vis λmax ? nm Extinction coefficient , ε? IR Major absorption bands ? cm−1 NMR Proton NMR 3.479 ppm, 1.208 ppm Carbon-13 NMR 65.97 ppm, 15.35 ppm Other NMR data MS Masses of main fragments
Linstrom, Peter (1997). . National Institute of Standards and Technology. doi :. {{cite journal}}:Cite journal requires |journal= (help)Except where noted otherwise, data relate to Standard temperature and pressure . Reliability of data general note. 