# Diethyl ether (data page)

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 SIRI, and follow its directions. MSDS for diethyl ether is available at Mallinckrodt Baker.

## Structure and properties

Structure and properties :
| Index of refraction, n$_D$ | 1.3497 at 24.8 °C |
| Abbe number | ? |
| Dielectric constant, ε$_r$ | 4.34 ε$_0$ at 20 °C 8.1 ε$_0$ at –64 °C 10.4 ε$_0$ 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, Δ$_{fus}$H$^o$ | 7.19 kJ/mol |
| Std entropy change of fusion, Δ$_{fus}$S$^o$ | 46.6 J/(mol·K) |
| Std enthalpy change of vaporization, Δ$_{vap}$H$^o$ | 27.530 kJ/mol at 11.85 °C 27.247 kJ/mol at 22.48 °C |
| Std entropy change of vaporization, Δ$_{vap}$S$^o$ | 96.60 J/(mol·K) at 12° |
| Solid properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{solid}$ | ? kJ/mol |
| Standard molar entropy, S$^o$$_{solid}$ | ? J/(mol K) |
| Heat capacity, c$_p$ | ? J/(mol K) |
| Liquid properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{liquid}$ | –271.2 kJ/mol |
| Standard molar entropy, S$^o$$_{liquid}$ | 253.5 J/(mol K) |
| Enthalpy of combustion, Δ$_c$H$^o$ | –2726.3 kJ/mol |
| Heat capacity, c$_p$ | 172.0 J/(mol K) |
| Gas properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{gas}$ | –252.7 kJ/mol |
| Standard molar entropy, S$^o$$_{gas}$ | 342.2 J/(mol K) |
| Heat capacity, c$_p$ | 119.46 J/(mol K) at 25 °C |
| van der Waals' constants | a = 1761 L$^2$ kPa/mol$^2$ b = 0.1344 liter per mole |

## Vapor pressure of liquid

| P in mm Hg | P in mm Hg | 1 | 10 | 40 | 100 | 400 | 760 | 1520 | 3800 | 7600 | 15200 | 30400 | 45600 |
| T in °C | 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.

## Distillation data

Vapor-liquid Equilibrium for Diethyl Ether/Methanol P = 700 mmHg :
| BP Temp. °C | % by mole ether | % by mole ether |
| BP Temp. °C | liquid | 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 :
| λ$_{max}$ | ? 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 | |