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.

Structure and properties

More information Structure and properties ...

Structure and properties
Index of refraction, n_D	1.4318 at 20°C
Abbe number	?
Dielectric constant, ε_r ^[1]	41.4 ε₀ at 20 °C
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Surface tension^[1]	47.99 dyn/cm at 25°C
Viscosity^[1]	16.1 mPa·s at 25°C

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Thermodynamic properties

More information Phase behavior, Solid 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_fusH^o	9.9 kJ/mol
Standard entropy change of fusion, Δ_fusS^o	38.2 J/(mol·K)
Standard enthalpy change of vaporization, Δ_vapH^o	65.6 kJ/mol
Standard entropy change of vaporization, Δ_vapS^o	? J/(mol·K)
Solid properties
Standard enthalpy change of formation, Δ_fH^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_fH^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_fH^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

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Vapor pressure of liquid

P in mm Hg		1	10	40	100	400	760
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.

**Temperature dependence of ethylene glycol vapor pressure.** Uses formula $\log _{e}P[{\text{kPa}}]=-25.99771\log _{e}T[{\text{K}}]-{\frac {14768.57}{T[{\text{K}}]}}+191.4250+2.062331\times 10^{-05}\,(T[{\text{K}}])^{2}$ obtained from CHERIC^[2]

{\displaystyle \log _{e}P[{\text{kPa}}]=-25.99771\log _{e}T[{\text{K}}]-{\frac {14768.57}{T[{\text{K}}]}}+191.4250+2.062331\times 10^{-05}\,(T[{\text{K}}])^{2}} — **Temperature dependence of ethylene glycol vapor pressure.** Uses formula $\log _{e}P[{\text{kPa}}]=-25.99771\log _{e}T[{\text{K}}]-{\frac {14768.57}{T[{\text{K}}]}}+191.4250+2.062331\times 10^{-05}\,(T[{\text{K}}])^{2}$ obtained from CHERIC^[2]

Freezing point of aqueous solutions

More information Freezing point (°F), Specific gravity d90° ...

% ethylene glycol by volume	5	10	15	20	25	30	35	40	45	50
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°	1.004	1.006	1.012	1.017	1.020	1.024	1.028	1.032	1.037	1.040

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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

More information BPtemp. °C, % by mole water ...

BP temp. °C	% by mole water
Vapor–liquid equilibrium for ethylene glycol/water^[3] P = 760 mmHg
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

BP temp. °C	% by mole methanol
Vapor–liquid equilibrium for ethylene glycol/methanol^[3] P = 760 mmHg
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

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Spectral data

More information UV-Vis, IR ...

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.

Ethylene glycol (data page)

Material Safety Data Sheet

Structure and properties

Thermodynamic properties

Vapor pressure of liquid

Freezing point of aqueous solutions

Distillation data

Spectral data

References

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