Ethylene glycol (data page)

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This page provides supplementary chemical data on ethylene glycol.

1 Material Safety Data Sheet
2 Structure and properties
3 Thermodynamic properties
4 Vapor pressure of liquid
5 Freezing point of aqueous solutions
6 Distillation data
7 Spectral data
8 References

[edit] Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions. MSDS for ethylene glycol is available at Mallinckrodt Baker.

[edit] Structure and properties

Structure and properties
Index of refraction, n_D	1.4318 at 20°C
Abbe number	?
Dielectric constant, ε_r	37.4 ε₀ at 25 °C
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Surface tension	47.7 dyn/cm at 20°C
Viscosity^[1]	17.33 mPa·s at 25°C

[edit] Thermodynamic properties

Phase behavior
Triple point	256 K (−17 °C), ? Pa
Critical point	720 K (447°C) 8.2 MPa
Std enthalpy change of fusion, Δ_fusH^o	9.9 kJ/mol
Std entropy change of fusion, Δ_fusS^o	38.2 J/(mol·K)
Std enthalpy change of vaporization, Δ_vapH^o	65.6 kJ/mol
Std entropy change of vaporization, Δ_vapS^o	? J/(mol·K)
Solid properties
Std 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
Std 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
Std enthalpy change of formation, Δ_fH^o_gas	−394.4 kJ/mol
Standard molar entropy, S^o_gas	311.8 J/(mol·K)
Heat capacity, c_p	78 J/(mol·K) at 25°C

[edit] 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.

log10 Ethylene glycol vapor pressure. Uses formula: obtained from CHERIC

log₁₀ Ethylene glycol vapor pressure. Uses formula: $\scriptstyle \log_e P_{mmHg} =$ $\scriptstyle \log_e (\frac {760} {101.325}) -25.99771 \log_e (T+273.15) - \frac {14768.57} {T+273.15} + 191.4250 + 2.062331 \times 10^{-05} (T+273.15)^2)$ obtained from CHERIC^[2]

[edit] Freezing point of aqueous solutions

% ethylene glycol by volume	5	10	15	20	25	30	35	40	45	50
Freezing point °C	–1.1	–2.2	–3.9	–6.7	–8.9	–12.8	–16.1	–20.6	–26.7	–33.3
Specific gravity d^15.6°	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. Dow Chemical. Retrieved on 13 June 2007.

[edit] Distillation data

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

[edit] 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

[edit] References

^ Lange's Handbook of Chemistry, 10th ed. 1669-1674
^ Pure Component Properties (Queriable database). Retrieved on 14 May 2007.
^ ^a ^b Binary Vapor-Liquid Equilibrium Data (Queriable database). Chemical Engineering Research Information Center. Retrieved on 8 June 2007.