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

Hydroquinone

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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
Sources

Physical Properties

Property Value Unit Source
Δcsolid [-2865.00; -2824.68] kJ/mol Show Hide
Δcsolid -2847.50 ± 1.20 kJ/mol NIST
Δcsolid Outlier -2824.68 kJ/mol NIST
Δcsolid -2852.40 ± 0.88 kJ/mol NIST
Δcsolid -2855.60 kJ/mol NIST
Δcsolid -2858.00 kJ/mol NIST
Δcsolid -2865.00 kJ/mol NIST
Δcsolid -2856.00 kJ/mol NIST
Δcsolid -2861.00 kJ/mol NIST
Δf -187.56 kJ/mol Joback Calculated Property
Δfgas [-277.00; -266.90] kJ/mol Show Hide
Δfgas -277.00 ± 1.40 kJ/mol NIST
Δfgas -272.00 kJ/mol NIST
Δfgas -268.90 kJ/mol NIST
Δfgas -266.90 kJ/mol NIST
Δfgas -268.40 kJ/mol NIST
Δfsolid [-371.10; -361.00] kJ/mol Show Hide
Δfsolid -371.10 ± 1.30 kJ/mol NIST
Δfsolid -366.10 ± 1.20 kJ/mol NIST
Δfsolid -363.00 ± 1.00 kJ/mol NIST
Δfsolid -361.00 kJ/mol NIST
Δfsolid -362.50 kJ/mol NIST
Δfus 17.29 kJ/mol Joback Calculated Property
Δsub [94.10; 103.76] kJ/mol Show Hide
Δsub 94.13 ± 0.53 kJ/mol NIST
Δsub 94.10 kJ/mol NIST
Δsub 94.10 ± 0.50 kJ/mol NIST
Δsub 99.20 ± 1.70 kJ/mol NIST
Δsub 103.76 kJ/mol NIST
Δvap 84.40 ± 0.70 kJ/mol NIST
IE [7.93; 8.44] eV Show Hide
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
logPoct/wat 1.098 Crippen Calculated Property
Pc 7561.44 kPa Joback Calculated Property
gas 343.10 ± 5.00 J/mol×K NIST
Tboil [558.00; 558.20] K Show Hide
Tboil 558.20 K NIST
Tboil 558.20 ± 1.00 K NIST
Tboil 558.20 K NIST
Tboil 558.00 K NIST
Tc 766.85 K Joback Calculated Property
Tfus 445.00 ± 0.60 K NIST
Tfus 445.00 K NIST
Tfus 443.50 ± 0.30 K NIST
Ttriple 445.98 ± 0.03 K NIST
Ttriple 445.50 ± 0.30 K NIST
Vc 0.196 m3/kg-mol Joback Calculated Property

Temperature Dependent Properties

Property Value Unit Temperature (K) Source
Cp,gas 186.33 J/mol×K 519.62 Joback Calculated Property
Cp,solid [130.50; 150.20] J/mol×K [274.30; 323.00] Show Hide
Plot of Solid phase heat capacity.
Cp,solid 130.50 J/mol×K 274.3 NIST
Cp,solid 133.50 J/mol×K 297.9 NIST
Cp,solid 139.70 J/mol×K 298.0 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 323.0 NIST
η 0.0000251 Pa×s 519.62 Joback Calculated Property
ΔfusH [26.48; 27.23] kJ/mol [444.95; 453.00] Show Hide
Plot of Enthalpy of fusion at a given temperature.
ΔfusH 26.50 kJ/mol 444.95 NIST
ΔfusH 27.23 kJ/mol 445.1 NIST
ΔfusH 27.11 kJ/mol 445.1 NIST
ΔfusH 27.11 kJ/mol 445.5 NIST
ΔfusH 26.48 kJ/mol 453.0 NIST
ΔsubH [93.70; 104.00] kJ/mol [322.00; 370.50] Show Hide
Plot of Enthalpy of sublimation at a given temperature.
ΔsubH 103.80 kJ/mol 322.0 NIST
ΔsubH 100.60 ± 1.30 kJ/mol 332.0 NIST
ΔsubH 93.70 ± 0.50 kJ/mol 334.0 NIST
ΔsubH 103.80 kJ/mol 335.5 NIST
ΔsubH 104.00 ± 1.00 kJ/mol 342.0 NIST
ΔsubH 99.00 ± 2.00 kJ/mol 351.0 NIST
ΔsubH 101.30 kJ/mol 370.5 NIST
ΔvapH 70.50 kJ/mol 503.5 NIST
ΔfusS 59.00 J/mol×K 444.95 NIST
ΔfusS 60.90 J/mol×K 445.5 NIST

Molecular Descriptors

Joback and Reid Groups
=C< (ring) 2
-OH (phenol) 2
=CH- (ring) 4

Similar Compounds

phenoxide anion. Phenol. Resorcinol. 1,3,5-Benzenetriol. Phloroglucinol dihydrate. 1,2-Benzenediol. Mequinol. Benzene, 1,4-dimethoxy-. 1,2,4-Benzenetriol. Benzene, methoxy-. Anisonitrile. 1,2,3-Benzenetriol. Phenol, 4-iodo-. 4-OH-benzyl. 4-F-phenoxy.

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