Skip to Content
Merck
All Photos(3)

Documents

H17902

Sigma-Aldrich

Hydroquinone

ReagentPlus®, 99%

Synonym(s):

1,4-Benzenediol, 1,4-Dihydroxybenzene, HQ

Sign Into View Organizational & Contract Pricing
All Photos(3)

About This Item

Linear Formula:
C6H4-1,4-(OH)2
CAS Number:
123-31-9
Molecular Weight:
110.11
Beilstein:
605970
EC Number:
204-617-8
MDL number:
MFCD00002339
UNSPSC Code:
12352100
PubChem Substance ID:
24895484
NACRES:
NA.21

vapor density

3.81 (vs air)

Quality Level

200

vapor pressure

1 mmHg ( 132 °C)

product line

ReagentPlus®

Assay

99%

autoignition temp.

930 °F

impurities

≤0.6% water (Karl Fischer)

bp

285 °C (lit.)

mp

171-175 °C
172-175 °C (lit.)

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

Looking for similar products? Visit Product Comparison Guide

General description

Hydroquinone (HQ), a phenolic compound, is also known as 1,4-dihydroxy-benzene. The detection of HQ along with resorcinol and phenol in air samples by synchronous fluorescence method has been proposed. The electrochemical oxidation of HQ has been studied using cyclic and differential pulse voltammetry. Its enthalpies of sublimation, vaporization and fusion have been reported.

Application

Hydroquinone may be used to synthesize bicyclic phosphonate derivative by reacting with phosphonic dichloride.

Legal Information

ReagentPlus 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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
MKCW0677
BCCL7343
MKCW6255
MKCW6254
MKCT2884

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Electrocatalytic activity and simultaneous determination of catechol and hydroquinone at mesoporous platinum electrode.
Ghanem MA.
Electrochemical Communications, 9(10), 2501-2506 (2007)
Reaction of hydroquinone with 2-ethoxyvinylphosphonyl dichloride.
Sadykova YM, et al.
Russian Chemical Bulletin, 61(10), 2009-2009 (2012)
Di-hydroxybenzenes: Catechol, resorcinol, and hydroquinone: Enthalpies of phase transitions revisited.
Verevkin SP and Kozlova SA.
Thermochimica Acta, 471(1), 33-42 (2008)
Simultaneous determination of hydroquinone and catechol at a glassy carbon electrode modified with multiwall carbon nanotubes.
Qi H and Zhang C.
Electroanalysis, 17(10), 832-838 (2005)
Determination of phenol, resorcinol and hydroquinone in air samples by synchronous fluorescence using partial least-squares (PLS).
Pistonesi MF, et al.
Talanta, 69(5), 1265-1268 (2006)
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service