# Ethylene glycol (data page)

This page provides supplementary chemical data on ethylene glycol.

## 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 and follow its directions.
* Science Stuff
* Mallinckrodt Baker.

## Structure and properties

Structure and properties :
| Index of refraction, n$_D$ | 1.4318 at 20°C |
| Abbe number | ? |
| Dielectric constant, ε$_r$ | 41.4 ε$_0$ at 20 °C |
| Bond strength | ? |
| Bond length | ? |
| Bond angle | ? |
| Magnetic susceptibility | ? |
| Surface tension | 47.99 dyn/cm at 25°C |
| Viscosity | 16.1 mPa·s at 25°C |

## Thermodynamic properties

Phase behavior :
| Triple point | 256 K (−17 °C), ? Pa |
| Critical point | 720 K (447 °C), 8.2 MPa |
| Standard enthalpy change of fusion, Δ$_{fus}$H$^o$ | 9.9 kJ/mol |
| Standard entropy change of fusion, Δ$_{fus}$S$^o$ | 38.2 J/(mol·K) |
| Standard enthalpy change of vaporization, Δ$_{vap}$H$^o$ | 65.6 kJ/mol |
| Standard entropy change of vaporization, Δ$_{vap}$S$^o$ | ? J/(mol·K) |
| Solid properties ||
| Standard 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 ||
| Standard enthalpy change of formation, Δ$_f$H$^o$$_{liquid}$ | −460 kJ/mol |
| Standard molar entropy, S$^o$$_{liquid}$ | 166.9 J/(mol·K) |
| Heat capacity, c$_p$ | 149.5 J/(mol·K) |
| Gas properties ||
| Standard enthalpy change of formation, Δ$_f$H$^o$$_{gas}$ | −3955.4 kJ/mol |
| Standard molar entropy, S$^o$$_{gas}$ | 311.8 J/(mol·K) |
| Heat capacity, c$_p$ | 78 J/(mol·K) at 25 °C |

## Vapor pressure of liquid

| P in mm Hg | P in mm Hg | 1 | 10 | 40 | 100 | 400 | 760 |
| T in °C | T in °C | 53.0 | 92.1 | 120.0 | 141.8 | 178.5 | 197.3 |
Table data obtained from CRC Handbook of Chemistry and Physics, 44th ed.

## Freezing point of aqueous solutions

| % ethylene glycol by volume | % ethylene glycol by volume | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
| Freezing point (°F) | Freezing point (°F) | −1.1 | −2.2 | −3.9 | −6.7 | −8.9 | −12.8 | −16.1 | −20.6 | −26.7 | −33.2 |
| Specific gravity d$^{90°}$ | Specific gravity d$^{90°}$ | 1.004 | 1.006 | 1.012 | 1.017 | 1.020 | 1.024 | 1.028 | 1.032 | 1.037 | 1.040 |
Table obtained from Lange's Handbook of Chemistry, 10th ed. Specific gravity is referenced to water at 15.6 °C.
See also "Typical Freezing and Boiling Points of Aqueous Solutions of DOWTHERM SR-1 and DOWTHERM-SR4000" (PDF). Dow Chemical. Archived from the original (PDF) on 27 September 2007. Retrieved 13 June 2007.

## Distillation data

Vapor–liquid equilibrium for ethylene glycol/water P = 760 mmHg :
| BP temp. °C | % by mole water | % by mole water |
| BP temp. °C | liquid | vapor |
| 110.00 | 79.8 | 99.3 |
| 116.40 | 61.3 | 98.5 |
| 124.30 | 55.9 | 97.7 |
| 124.50 | 55.3 | 97.6 |
| 126.00 | 48.2 | 97.1 |
| 128.10 | 42.6 | 96.3 |
| 129.50 | 41.1 | 96.2 |
| 130.50 | 38.8 | 95.5 |
| 131.20 | 36.5 | 95.2 |
| 135.20 | 28.9 | 92.6 |
| 136.00 | 28.3 | 92.4 |
| 138.00 | 24.1 | 90.9 |
| 142.50 | 21.6 | 88.7 |
| 149.00 | 17.8 | 85.2 |
| 158.10 | 12.9 | 77.6 |
| 167.40 | 10.2 | 70.6 |
| 178.60 | 6.5 | 56.3 |
| 184.20 | 3.4 | 37.9 |
Vapor–liquid equilibrium for ethylene glycol/methanol P = 760 mmHg :
| BP temp. °C | % by mole methanol | % by mole methanol |
| BP temp. °C | liquid | vapor |
| 66.70 | 93.0 | 99.9 |
| 73.20 | 82.1 | 99.8 |
| 79.60 | 66.4 | 99.7 |
| 84.70 | 53.0 | 99.3 |
| 90.20 | 45.7 | 99.0 |
| 93.80 | 40.6 | 98.5 |
| 101.40 | 36.3 | 97.9 |
| 102.70 | 35.6 | 97.5 |
| 104.90 | 32.2 | 96.7 |
| 105.10 | 22.7 | 94.6 |
| 109.90 | 21.2 | 93.3 |
| 113.00 | 19.5 | 92.3 |
| 121.50 | 13.7 | 86.4 |
| 149.60 | 10.3 | 74.6 |
| 157.50 | 4.6 | 51.5 |
| 166.30 | 3.6 | 42.0 |
| 175.20 | 2.5 | 30.4 |
| 183.50 | 1.4 | 18.1 |
| 189.10 | 0.5 | 6.8 |

## Spectral data

UV-Vis :
| λ$_{max}$ | ? nm |
| Extinction coefficient, ε | ? |
| IR ||
| Major absorption bands | ? cm$^{−1}$ |
| NMR ||
| Proton NMR | 3.3-3.7 ppm |
| Carbon-13 NMR | 62-65 ppm |
| 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.