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1.04610

Sigma-Aldrich

Hydroquinone

Technipur®

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Synonym(s):
1,4-Benzenediol, 1,4-Dihydroxybenzene, 4-Hydroxyphenol, p-Benzenediol, p-Dihydroxybenzene, p-Hydroquinone, p-Hydroxyphenol, Benzoquinol, Quinol, HQ
Linear Formula:
C6H4-1,4-(OH)2
CAS Number:
123-31-9
Molecular Weight:
110.11
Beilstein:
605970
MDL number:
MFCD00002339
UNSPSC Code:
41116107
NACRES:
NA.22

vapor density

3.81 (vs air)

Quality Level

200

vapor pressure

1 mmHg ( 132 °C)

autoignition temp.

930 °F

bp

285 °C (lit.)

mp

172-175 °C (lit.)

density

1.358 g/cm3 at 20 °C

SMILES string

Oc1ccc(O)cc1

InChI

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

InChI key

QIGBRXMKCJKVMJ-UHFFFAOYSA-N

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Application

Hydroquinone can be used as:
  • A reducing agent in the preparation of silver sols, gold nanoparticles and nanorods for material science applications.(1)(2)(3)
  • A polymerization inhibitor in the synthesis of industrially important 4-vinylphenols via decarboxylation of 4-hydroxycinnamic acids.(4)
  • A phase change material (PCM) applicable in solar cooling refrigeration technology.(5)

Legal Information

Technipur is a registered trademark of Merck KGaA, Darmstadt, Germany

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 2 - Eye Dam. 1 - Muta. 2 - Skin Sens. 1B

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

329.0 °F - closed cup

Flash Point(C)

165 °C - closed cup

Regulatory Information

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Experimental analysis of hydroquinone used as phase change material (PCM) to be applied in solar cooling refrigeration
Gil A, et al.
International Journal of Refrigeration, 39, 95-103 (2014)
Controlled particle growth of silver sols through the use of hydroquinone as a selective reducing agent
Gentry ST, et al.
Langmuir, 25(5), 2613-2621 (2009)
High-yield synthesis of gold nanorods with longitudinal SPR peak greater than 1200 nm using hydroquinone as a reducing agent
Vigderman L and Zubarev ER
Chemistry of Materials, 25(8), 1450-1457 (2013)
Obtaining 4-vinylphenols by decarboxylation of natural 4-hydroxycinnamic acids under microwave irradiation
Bernini R, et al.
Tetrahedron, 63(39), 9663-9667 (2007)
The formation of gold nanoparticles using hydroquinone as a reducing agent through a localized pH change upon addition of NaOH to a solution of HAuCl4
Mechler A, et al.
Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 370(1-3), 35-41 (2010)

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