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Safety Information

H17902

Sigma-Aldrich

Hydroquinone

ReagentPlus®, 99%

Synonym(s):

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

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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

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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

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

PRTR

Class I Designated Chemical Substances

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

H17902-VAR:
H17902-500G:4548173949512
H17902-100G:4548173949499
H17902-BULK:
H17902-2KG:4548173949505

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Certificates of Analysis (COA)

Lot/Batch Number
MKCW0677
MKCW6255
BCCL7343
MKCW6254
MKCT2884

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Di-hydroxybenzenes: Catechol, resorcinol, and hydroquinone: Enthalpies of phase transitions revisited.
Verevkin SP and Kozlova SA.
Thermochimica Acta, 471(1), 33-42 (2008)
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)
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)
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