Glycerol (data page)

This page provides supplementary chemical data on glycerol.

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

Structure and properties
Index of refraction, n_D	1.4729 at 20 °C
Abbe number	?
Dielectric constant, ε_r	42.5 ε₀ at 25 °C
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Surface tension^[1]	63.4 mN/m at 20 °C 58.6 mN/m at 90 °C 51.9 mN/m at 150 °C
Viscosity^[2]	1.412 Pa·s at 20 °C

Thermodynamic properties

Phase behavior
Triple point	291.8 K (18.7 °C), ~99500 Pa
Critical point	850 K (577 °C), 7500 kPa
Std enthalpy change of fusion, Δ_fusH^o	18.28 kJ/mol
Std entropy change of fusion, Δ_fusS^o	62.7 J/(mol·K)
Std enthalpy change of vaporization, Δ_vapH^o	91.7 kJ/mol
Std entropy change of vaporization, Δ_vapS^o	201 J/(mol·K)
Solid properties
Std enthalpy change of formation, Δ_fH^o_solid	? kJ/mol
Standard molar entropy, S^o_solid	37.87 J/(mol K)^[3]
Heat capacity, c_p	150. J/(mol K) 6 °C - 11 °C
Liquid properties
Std enthalpy change of formation, Δ_fH^o_liquid	–669.6 kJ/mol
Standard molar entropy, S^o_liquid	206.3 J/(mol K)^[4]
Enthalpy of combustion, Δ_cH^o	–1654.3 kJ/mol
Heat capacity, c_p	221.9 J/(mol K) at 25 °C
Gas properties
Std enthalpy change of formation, Δ_fH^o_gas	–577.9 kJ/mol
Standard molar entropy, S^o_gas	? J/(mol K)
Heat capacity, c_p	? J/(mol K)

Vapor pressure of liquid

P in mm Hg		1	10	40	100	400	760
T in °C		125.5	167.2	198.0	220.1	263.0	290.0

Table data obtained from CRC Handbook of Chemistry and Physics, 44th ed.

log_e of Glycerol vapor pressure. Uses formula: $\scriptstyle \log _{e}P_{kPa}=$ $\scriptstyle A\times ln(T)+B/T+C+D\times T^{2}$ with coefficients A=-2.125867E+01, B=-1.672626E+04, C=1.655099E+02, and D=1.100480E-05 obtained from CHERIC^[5]

Freezing point of aqueous solutions

% glycerol by weight	10	20	30	40	50	60	70	80	90	100
Freezing point °C	–1.6	–4.8	–9.5	–15.5	–22.0	–33.6	–37.8	–19.2	–1.6	17.0
Specific gravity d^15°	1.02415	1.04935	1.07560	1.10255	1.12985	1.15770	1.18540	1.21290	1.23950	1.26557

Table data obtained from Lange's Handbook of Chemistry, 10th ed. Specific gravity is at 15 °C, referenced to water at 15 °C.

See details on: Freezing Points of Glycerine-Water Solutions Dow Chemical ^[6] or Freezing Points of Glycerol and Its Aqueous Solutions.^[7]

BP Temp. °C	% by mole water
Vapor-liquid Equilibrium of Glycerol/water^[8] P = 760 mmHg
BP Temp. °C	liquid	vapor
278.8	2.75	93.15
247.0	4.67	94.73
224.0	6.90	95.63
219.2	7.67	97.43
210.0	9.01	97.83
202.5	10.31	97.24
196.5	11.59	98.39
175.2	17.56	98.99
149.3	30.04	99.64
137.2	38.47	99.76
136.8	38.95	98.78
131.8	43.58	99.76
121.5	56.33	99.84
112.8	70.68	99.93
111.3	73.86	99.94
106.3	84.42	99.96

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

Glycerol (data page)

Structure and properties

Thermodynamic properties

Vapor pressure of liquid

Freezing point of aqueous solutions

Distillation data

Spectral data

References

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