# 1,2-Dichloroethane (data page)

This page provides supplementary chemical data on 1,2-dichloroethane.

## Structure and properties

Structure and properties :
| Index of refraction, n$_D$ | 1.4448 |
| Abbe number | ? |
| Dielectric constant, ε$_r$ | 10.5 ε$_0$ at 20 °C |
| Bond strength | ? |
| Bond length | ? |
| Bond angle | ? |
| Magnetic susceptibility | ? |
| Surface tension | 40.05 mN/m at 10 °C 38.75 mN/m at 20 °C 28.4 mN/m at 100 °C |
| Viscosity | 1.1322 mPa·s at 0 °C 0.8385 mPa·s at 20 °C 0.6523 mPa·s at 40 °C 0.4357 mPa·s at 80 °C |

## Thermodynamic properties

Phase behavior :
| Triple point | 237.2 K (–35.9 °C), ? Pa |
| Critical point | 561.6 K (288.5 °C), 5380 kPa |
| Std enthalpy change of fusion, Δ$_{fus}$H$^o$ | 8.8366 kJ/mol at –35.9 °C |
| Std entropy change of fusion, Δ$_{fus}$S$^o$ | 37.25 J/(mol·K) at –35.9 °C |
| Std enthalpy change of vaporization, Δ$_{vap}$H$^o$ | 33.91 kJ/mol at 20 °C |
| Std entropy change of vaporization, Δ$_{vap}$S$^o$ | ? J/(mol·K) |
| 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$$_{liquid}$ | –169.7 kJ/mol |
| Standard molar entropy, S$^o$$_{liquid}$ | 208.53 J/(mol K) |
| Enthalpy of combustion, Δ$_c$H$^o$$_{liquid}$ | –1236.4 kJ/mol |
| Heat capacity, c$_p$ | 129.0 J/(mol K) |
| Gas properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{gas}$ | –125.4 kJ/mol |
| Standard molar entropy, S$^o$$_{gas}$ | ? J/(mol K) |
| Heat capacity, c$_p$ | 77.5 J/(mol K) at 25 °C |

## 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 | –44.5$_{(s)}$ | –13.6 | 10.0 | 29.4 | 64.0 | 83.4 | 108.1 | 147.8 | 183.5 | 226.5 | 272.0 | — |
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed. The (s) annotation indicates temperature is equilibrium of vapor over solid. Otherwise temperature is equilibrium of vapor over liquid.

## Distillation data

See also:
* Tetrachloroethylene (data page)
Vapor-liquid equilibrium of 1,2-Dichloroethylene/ Methanol P = 96.7 kPa :
| BP Temp. °C | % by mole methanol | % by mole methanol |
| BP Temp. °C | liquid | vapor |
| 63.3 | 100.00 | 100.00 |
| 60.2 | 92.01 | 82.50 |
| 59.3 | 79.52 | 72.06 |
| 58.9 | 69.03 | 66.43 |
| 59.1 | 63.50 | 63.50 |
| 59.0 | 59.02 | 63.27 |
| 59.3 | 47.91 | 63.25 |
| 59.6 | 43.02 | 62.55 |
| 61.8 | 15.03 | 54.15 |
| 66.7 | 6.01 | 42.03 |
| 82.15 | 0.00 | 0.0 |
Vapor-liquid equilibrium of 1,2-Dichloroethylene/ Ethanol P = 760 mm Hg :
| BP Temp. °C | % by mole ethanol | % by mole ethanol |
| BP Temp. °C | liquid | vapor |
| 79.9 | 3.0 | 13.0 |
| 78.0 | 4.2 | 19.5 |
| 76.7 | 7.3 | 23.3 |
| 74.1 | 11.3 | 31.5 |
| 72.6 | 15.2 | 36.0 |
| 70.9 | 28.3 | 43.6 |
| 70.5 | 34.5 | 45.2 |
| 70.2 | 42.5 | 47.8 |
| 70.1 | 48.8 | 49.8 |
| 70.2 | 59.8 | 53.5 |
| 70.8 | 70.5 | 58.2 |
| 71.4 | 76.5 | 62.8 |
| 72.1 | 81.7 | 67.0 |
| 74.7 | 92.3 | 81.7 |
| 75.7 | 94.8 | 86.5 |
| 77.3 | 97.8 | 94.5 |
Vapor-liquid equilibrium of 1,2-Dichloroethylene/ Toluene P = 760 mm Hg :
| BP Temp. °C | % by mole dichloroethane | % by mole dichloroethane |
| BP Temp. °C | liquid | vapor |
| 85.5 | 89.7 | 94.2 |
| 87.5 | 80.1 | 89.2 |
| 89.1 | 69.8 | 82.1 |
| 91.3 | 60.5 | 78.2 |
| 92.9 | 54.0 | 72.5 |
| 94.6 | 48.2 | 66.3 |
| 97.1 | 39.8 | 60.3 |
| 97.8 | 36.4 | 55.0 |
| 101.5 | 26.2 | 42.4 |
| 102.7 | 20.0 | 34.8 |
| 105.7 | 14.0 | 27.5 |
| 108.1 | 7.0 | 16.9 |
| 109.1 | 1.8 | 6.6 |
Vapor-liquid equilibrium of 1,2-Dichloroethylene/ Cyclohexane P = 760 mm Hg :
| BP Temp. °C | % by mole cyclohexane | % by mole cyclohexane |
| BP Temp. °C | liquid | vapor |
| 80.5 | 6.50 | 14.60 |
| 80.0 | 8.25 | 17.00 |
| 78.8 | 12.00 | 23.70 |
| 77.6 | 17.30 | 29.80 |
| 77.0 | 21.50 | 33.40 |
| 76.4 | 26.15 | 37.50 |
| 75.9 | 31.90 | 40.80 |
| 75.6 | 36.10 | 43.60 |
| 75.2 | 42.95 | 47.60 |
| 75.1 | 51.70 | 52.50 |
| 75.1 | 52.45 | 53.00 |
| 75.1 | 56.10 | 55.10 |
| 75.2 | 59.75 | 57.10 |
| 75.7 | 72.90 | 65.60 |
| 76.6 | 82.00 | 73.50 |
| 77.5 | 88.00 | 79.80 |
| 79.3 | 95.50 | 91.50 |

## 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.