Chemical Properties of Hydroquinone (CAS 123-31-9)

InChI

InChI=1S/C6H6O2/c7-5-1-2-6(8)4-3-5/h1-4,7-8H

InChI Key

QIGBRXMKCJKVMJ-UHFFFAOYSA-N

Formula

C6H6O2

SMILES

Oc1ccc(O)cc1

Molecular Weight¹

110.11

CAS

123-31-9

Other Names

• 1,4-Benzenediol
• 1,4-Benzenediol (hydroquinone)
• 1,4-Dihydroxy-benzeen
• 1,4-Dihydroxy-benzol
• 1,4-Dihydroxybenzen
• 1,4-Dihydroxybenzene
• 1,4-Diidrobenzene
• 4-Hydroxyphenol
• Aida
• Arctuvin
• Benzene, p-dihydroxy-
• Benzohydroquinone
• Benzoquinol
• Black & White Bleaching Cream
• Black and White Bleaching Cream
• Derma-Blanch
• Diak 5
• Dihydroquinone
• Eldopacque
• Eldopaque
• Eldopaque forte
• Eldoquin
• Eldoquin forte
• HE 5
• Hidroquinone
• Hydrochinon
• Hydrochinone
• Hydroquinol
• Hydroquinole
• Idrochinone
• NCI-C55834
• Phiaquin
• Quinol
• Solaquin forte
• Tecquinol
• Tenox HQ
• Tequinol
• UN 2662
• USAF EK-356
• p-Benzenediol
• p-Dihydroquinone
• p-Dihydroxybenzene
• p-Dioxobenzene
• p-Dioxybenzene
• p-Hydroquinone
• p-Hydroxyphenol
• p-quinol

• ω : Acentric Factor.
• Δ_cH°_solid : Standard solid enthalpy of combustion (kJ/mol).
• C_p,gas : Ideal gas heat capacity (J/mol×K).
• C_p,solid : Solid phase heat capacity (J/mol×K).
• η : Dynamic viscosity (Pa×s).
• Δ_fG° : Standard Gibbs free energy of formation (kJ/mol).
• Δ_fH°_gas : Enthalpy of formation at standard conditions (kJ/mol).
• Δ_fH°_solid : Solid phase enthalpy of formation at standard conditions (kJ/mol).
• Δ_fusH° : Enthalpy of fusion at standard conditions (kJ/mol).
• Δ_fusH : Enthalpy of fusion at a given temperature (kJ/mol).
• Δ_subH° : Enthalpy of sublimation at standard conditions (kJ/mol).
• Δ_subH : Enthalpy of sublimation at a given temperature (kJ/mol).
• Δ_vapH° : Enthalpy of vaporization at standard conditions (kJ/mol).
• Δ_vapH : Enthalpy of vaporization at a given temperature (kJ/mol).
• IE : Ionization energy (eV).
• log₁₀WS : Log10 of Water solubility in mol/l.
• logP_oct/wat : Octanol/Water partition coefficient.
• McVol : McGowan's characteristic volume (ml/mol).
• P_c : Critical Pressure (kPa).
• P_sub : Sublimation pressure (kPa).
• ρ_l : Liquid Density (kg/m³).
• ρ_s : Solid Density (kg/m³).
• I_np : Non-polar retention indices.
• I : Polar retention indices.
• Δ_fusS : Entropy of fusion at a given temperature (J/mol×K).
• S°_gas : Molar entropy at standard conditions (J/mol×K).
• T_boil : Normal Boiling Point Temperature (K).
• T_boilr : Boiling point at reduced pressure (K).
• T_c : Critical Temperature (K).
• T_fus : Normal melting (fusion) point (K).
• T_triple : Triple Point Temperature (K).
• V_c : Critical Volume (m³/kmol).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ω	0.5944		Relay (1.0) Calculated Property
ΔcH°solid	[-2865.00; -2824.68]	kJ/mol
ΔcH°solid	-2847.50 ± 1.20	kJ/mol	NIST
ΔcH°solid	Outlier -2824.68	kJ/mol	NIST
ΔcH°solid	-2852.40 ± 0.88	kJ/mol	NIST
ΔcH°solid	-2855.60	kJ/mol	NIST
ΔcH°solid	-2858.00	kJ/mol	NIST
ΔcH°solid	-2865.00	kJ/mol	NIST
ΔcH°solid	-2856.00	kJ/mol	NIST
ΔcH°solid	-2861.00	kJ/mol	NIST
ΔfG°	-187.56	kJ/mol	Joback Calculated Property
ΔfH°gas	[-277.00; -266.90]	kJ/mol
ΔfH°gas	-277.00 ± 1.40	kJ/mol	NIST
ΔfH°gas	-272.00	kJ/mol	NIST
ΔfH°gas	-268.90	kJ/mol	NIST
ΔfH°gas	-266.90	kJ/mol	NIST
ΔfH°gas	-268.40	kJ/mol	NIST
ΔfH°solid	[-371.10; -361.00]	kJ/mol
ΔfH°solid	-371.10 ± 1.30	kJ/mol	NIST
ΔfH°solid	-366.10 ± 1.20	kJ/mol	NIST
ΔfH°solid	-363.00 ± 1.00	kJ/mol	NIST
ΔfH°solid	-361.00	kJ/mol	NIST
ΔfH°solid	-362.50	kJ/mol	NIST
ΔfusH°	[23.78; 27.23]	kJ/mol
ΔfusH°	27.23	kJ/mol	Di-Hydroxybenzenes: Catechol, Resorcinol, and Hydroquinone. Enthalpies of Phase Transitions Revisited
ΔfusH°	23.78	kJ/mol	Measurement of enthalpy curves of phase change materials via DSC and T-History: When are both methods needed to estimate the behaviour of the bulk material in applications?
ΔsubH°	[94.10; 103.76]	kJ/mol
ΔsubH°	94.13 ± 0.53	kJ/mol	NIST
ΔsubH°	94.10	kJ/mol	NIST
ΔsubH°	94.10 ± 0.50	kJ/mol	NIST
ΔsubH°	99.20 ± 1.70	kJ/mol	NIST
ΔsubH°	103.76	kJ/mol	NIST
ΔvapH°	84.40 ± 0.70	kJ/mol	NIST
IE	[7.93; 8.44]	eV
IE	7.94 ± 0.01	eV	NIST
IE	7.93 ± 0.01	eV	NIST
IE	7.95 ± 0.05	eV	NIST
IE	7.95 ± 0.03	eV	NIST
IE	8.44	eV	NIST
log10WS	[-0.17; -0.17]
log10WS	-0.17		Aq. Solubility Prediction
log10WS	-0.17		Estimated Solubility
logPoct/wat	1.098		Crippen Calculated Property
McVol	83.380	ml/mol	McGowan Calculated Property
Pc	7561.44	kPa	Joback Calculated Property
Inp	[207.49; 1334.00]
Inp	1327.00		NIST
Inp	1334.00		NIST
Inp	1241.00		NIST
Inp	1334.00		NIST
Inp	220.60		NIST
Inp	207.49		NIST
Inp	220.60		NIST
Inp	1334.00		NIST
Inp	1241.00		NIST
Inp	1327.00		NIST
I	[2693.00; 2693.00]
I	2693.00		NIST
I	2693.00		NIST
I	2693.00		NIST
S°gas	343.10 ± 5.00	J/mol×K	NIST
Tboil	[558.20; 558.20]	K
Tboil	558.20	K	NIST
Tboil	558.20 ± 1.00	K	NIST
Tc	757.75	K	Relay (1.0) Calculated Property
Tfus	[443.50; 445.35]	K
Tfus	445.35	K	Aq. Solubility Prediction
Tfus	445.15	K	Liquid pharmaceuticals formulation by eutectic formation
Tfus	445.00	K	Enthalpies of formation of dihydroxybenzenes revisited: Combining experimental and high-level ab initio data
Tfus	445.00 ± 0.60	K	NIST
Tfus	445.00	K	NIST
Tfus	Outlier 443.50 ± 0.30	K	NIST
Ttriple	[445.50; 445.98]	K
Ttriple	445.98 ± 0.03	K	NIST
Ttriple	445.50 ± 0.30	K	NIST
Vc	0.269	m3/kmol	Relay (1.0) Calculated Property

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
Cp,gas	[186.33; 226.33]	J/mol×K	[519.62; 766.85]
Cp,gas	186.33	J/mol×K	519.62	Joback Calculated Property
Cp,gas	194.85	J/mol×K	560.83	Joback Calculated Property
Cp,gas	202.41	J/mol×K	602.03	Joback Calculated Property
Cp,gas	209.18	J/mol×K	643.24	Joback Calculated Property
Cp,gas	215.32	J/mol×K	684.44	Joback Calculated Property
Cp,gas	220.99	J/mol×K	725.65	Joback Calculated Property
Cp,gas	226.33	J/mol×K	766.85	Joback Calculated Property
Cp,solid	[130.50; 150.20]	J/mol×K	[274.30; 323.00]
Cp,solid	130.50	J/mol×K	274.30	NIST
Cp,solid	133.50	J/mol×K	297.90	NIST
Cp,solid	139.70	J/mol×K	298.00	NIST
Cp,solid	131.90	J/mol×K	298.15	NIST
Cp,solid	136.40	J/mol×K	298.15	NIST
Cp,solid	150.20	J/mol×K	323.00	NIST
η	[0.0000251; 0.0009603]	Pa×s	[394.72; 519.62]
η	0.0009603	Pa×s	394.72	Joback Calculated Property
η	0.0004493	Pa×s	415.54	Joback Calculated Property
η	0.0002260	Pa×s	436.35	Joback Calculated Property
η	0.0001210	Pa×s	457.17	Joback Calculated Property
η	0.0000684	Pa×s	477.99	Joback Calculated Property
η	0.0000406	Pa×s	498.80	Joback Calculated Property
η	0.0000251	Pa×s	519.62	Joback Calculated Property
ΔfusH	[26.48; 27.23]	kJ/mol	[444.95; 453.00]
ΔfusH	26.50	kJ/mol	444.95	NIST
ΔfusH	27.23	kJ/mol	445.10	NIST
ΔfusH	27.11	kJ/mol	445.10	NIST
ΔfusH	27.11	kJ/mol	445.50	NIST
ΔfusH	26.48	kJ/mol	453.00	NIST
ΔsubH	[93.70; 104.00]	kJ/mol	[322.00; 370.50]
ΔsubH	103.80	kJ/mol	322.00	NIST
ΔsubH	100.60 ± 1.30	kJ/mol	332.00	NIST
ΔsubH	93.70 ± 0.50	kJ/mol	334.00	NIST
ΔsubH	103.80	kJ/mol	335.50	NIST
ΔsubH	104.00 ± 1.00	kJ/mol	342.00	NIST
ΔsubH	99.00 ± 2.00	kJ/mol	351.00	NIST
ΔsubH	101.30	kJ/mol	370.50	NIST
ΔvapH	70.50	kJ/mol	503.50	NIST
Psub	[5.13e-05; 3.53e-04]	kPa	[322.80; 339.40]
Psub	5.56e-05	kPa	322.80	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	5.45e-05	kPa	322.80	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	5.13e-05	kPa	322.80	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	6.59e-05	kPa	324.80	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	7.43e-05	kPa	324.90	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	6.93e-05	kPa	324.90	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	9.44e-05	kPa	326.90	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	8.72e-05	kPa	326.90	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	8.46e-05	kPa	326.90	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	1.13e-04	kPa	328.90	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	1.09e-04	kPa	329.00	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	1.05e-04	kPa	329.00	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	1.38e-04	kPa	331.00	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	1.38e-04	kPa	331.00	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	1.42e-04	kPa	331.10	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	1.77e-04	kPa	333.10	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	1.72e-04	kPa	333.20	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	1.69e-04	kPa	333.20	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	2.32e-04	kPa	335.20	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	2.17e-04	kPa	335.20	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	2.12e-04	kPa	335.20	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	2.62e-04	kPa	337.20	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	2.75e-04	kPa	337.30	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	2.64e-04	kPa	337.30	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	3.53e-04	kPa	339.20	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	3.40e-04	kPa	339.40	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
Psub	3.33e-04	kPa	339.40	Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
ρl	1328.00	kg/m3	293.15	Measurements of Liquid Liquid Equilibria for the Quaternary System 2-Methoxy-2-methylpropane + Phenol + Hydroquinone + Water at 313.15 K
ρs	[1332.00; 1338.00]	kg/m3	[293.20; 298.15]
ρs	1332.00	kg/m3	293.20	Ternary and Quaternary Liquid-Liquid Equilibria for Systems of Methyl Butyl Ketone + Water + Hydroquinone + Phenol at 313.2 K and Atmospheric Pressure
ρs	1338.00	kg/m3	298.15	Liquid liquid equilibria for the quaternary system methyl isobutyl ketone water phenol hydroquinone
ΔfusS	[59.00; 60.90]	J/mol×K	[444.95; 445.50]
ΔfusS	59.00	J/mol×K	444.95	NIST
ΔfusS	60.90	J/mol×K	445.50	NIST

Pressure Dependent Properties

Property	Value	Unit	Pressure (kPa)	Source
Tboilr	[558.00; 558.20]	K	[97.30; 97.30]
Tboilr	558.20	K	97.30	NIST
Tboilr	558.00	K	97.30	NIST

Similar Compounds

Find more compounds similar to Hydroquinone.

Mixtures

• Choline chloride + Hydroquinone
• 2-Hexanone + Hydroquinone + Water
• Hydroquinone + Water
• Hydroquinone + Propane, 2-methoxy-2-methyl- + Water
• Hydroquinone + Ethyl Acetate
• Hydroquinone + Acetic acid, butyl ester
• Hydroquinone + Acetic acid
• Hydroquinone + Methyl Alcohol
• Ethanol + Hydroquinone
• Isopropyl Alcohol + Hydroquinone
• Hydroquinone + Water + 1,4,7,10,13,16-Hexaoxacyclooctadecane
• 2-Butanone, 3-methyl- + Hydroquinone + Water
• Methyl Isobutyl Ketone + Hydroquinone + Water
• 2-Pentanone + Hydroquinone + Water
• 2-Octanone + Hydroquinone + Water

Sources

• Cheméo Relay (1.0)
• Crippen Method
• Liquid liquid equilibria for the quaternary system methyl isobutyl ketone water phenol hydroquinone
• Ternary liquid-liquid equilibria for methyl isopropyl ketone + (resorcinol or hydroquinone) + water systems at different temperatures
• Liquid-liquid equilibrium for ternary systems, methyl isobutyl ketone +(catechol, resorcinol and hydroquinone) + water at 333.15 K, 343.15 K and 353.15 K
• Liquid pharmaceuticals formulation by eutectic formation
• Effects of structural isomerism on solution behaviour of solutes: Apparent molar volumes and isentropic compression of catechol, resorcinal, and hydroquinone in aqueous solution at T = (283.15, 293.15, 298.15, 303.15, and 313.15) K
• Enthalpies of formation of dihydroxybenzenes revisited: Combining experimental and high-level ab initio data
• Experimental result and data correlation of liquid-liquid equilibrium for methyl isopropyl ketone + o, m, p-dihydroxybenzene + water at 333.15 K, 343.15 K and 353.15 K
• Di-Hydroxybenzenes: Catechol, Resorcinol, and Hydroquinone. Enthalpies of Phase Transitions Revisited
• Measurement of enthalpy curves of phase change materials via DSC and T-History: When are both methods needed to estimate the behaviour of the bulk material in applications?
• Ternary and Quaternary Liquid-Liquid Equilibria for Systems of Methyl Butyl Ketone + Water + Hydroquinone + Phenol at 313.2 K and Atmospheric Pressure
• Solubility of 3,7,9,11-Tetraoxo-2,4,6,8,10-pentaaza[3.3.3] Propellane (TOPAP) in Different Pure Solvents at Temperatures between 273.15 and 318.15 K
• Liquid-Liquid Equilibria for Ternary (Methyl Propyl Ketone + Hydroquinone or Resorcinol + Water) Systems at 298.15, 318.15, and 333.15 K
• Liquid Liquid Equilibria for Octan-2-one + Dihydroxybenzene + Water at Different Temperatures: Experimental Data and Thermodynamic Modeling
• Measurements and Thermodynamic Modeling of Liquid-Liquid Equilibria Data for the Ternary (Methyl Propyl Ketone + Catechol/Resorcinol/Hydroquinone + Water) Systems
• Solubility of Hydroquinone in Different Solvents from 276.65 K to 345.10 K
• Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
• Liquid-Liquid Equilibria for the Ternary System Methyl Isobutyl Ketone + Water + Hydroquinone
• Measurements of Liquid Liquid Equilibria for the Quaternary System 2-Methoxy-2-methylpropane + Phenol + Hydroquinone + Water at 313.15 K
• Liquid Liquid Equilibria for Ternary Systems: Methyl Butyl Ketone + Phenol + Water and Methyl Butyl Ketone + Hydroquinone + Water at 298.15 K and 323.15 K
• Activity Coefficient Studies in Ternary Aqueous Solutions at 298.15 K: H2O + r-Cyclodextrin + Potassium Acetate and H2O + 18-Crown-6 + Hydroquinone Systems
• Joback Method
• KDB
• Aqueous Solubility Prediction Method
• Estimated Solubility Method
• McGowan Method
• NIST Webbook

Note: Cheméo is only indexing the data, follow the source links to retrieve the latest data. The source is also providing more information like the publication year, authors and more. Take the time to validate and double check the source of the data.
Outlier This icon means that the value is more than 2 standard deviations away from the property mean.