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53960

Sigma-Aldrich

Hydroquinone

≥99.0% (HPLC)

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:
12352200

vapor density

3.81 (vs air)

vapor pressure

1 mmHg ( 132 °C)

Assay

≥99.0% (HPLC)

autoignition temp.

930 °F

bp

285 °C (lit.)

mp

171-173 °C
172-175 °C (lit.)

solubility

H2O: 50 mg/mL, clear

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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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

53960-VAR:
53960-BULK:
53960-500G:
53960-1KG:
53960-100G:

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Certificates of Analysis (COA)

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Se Eun Byeon et al.
Free radical biology & medicine, 57, 105-118 (2013-01-08)
The hydroxylated benzene metabolite hydroquinone (HQ) is mainly generated from benzene, an important industrial chemical, and is also a common dietary component. Although numerous papers have addressed the potential role of HQ in tumorigenic responses, the immunosuppressive and anti-inflammatory effects
Harishchandra Digambar Jirimali et al.
Carbohydrate polymers, 92(1), 641-644 (2012-12-12)
A redox active polymer, hydroquinone modified chitosan (Q-chitosan) was synthesized and characterized by IR and (1)H NMR spectroscopy. The nanocomposite of Q-chitosan with carbon was prepared and used to construct a stable conductive film on the electrode surface. The SEM
Koussake Kombaté et al.
International journal of dermatology, 51 Suppl 1, 27-29 (2012-12-12)
This study aims at describing the clinical characteristics of patients with acne using skin bleaching (SB) products. This is a prospective study conducted over 8 months in three dermatology departments and one private clinic. All patients examined for acne were
M Rendon et al.
Annales de dermatologie et de venereologie, 139 Suppl 3, S102-S107 (2012-12-25)
Hyperpigmentation has traditionally been a relatively difficult condition to treat, especially in darker racial ethnic groups. Multiple topical agents available act upon different steps of the pigmentation pathway. We review these topical agents, their mechanisms of action, and their effectiveness
Eri Koyachi et al.
Biosensors & bioelectronics, 42, 640-645 (2013-01-01)
An electrochemical microdevice was fabricated for on-site rapid freshness determination of rice. The activity of peroxidase was used as an indicator for freshness. With hydrogen peroxide and hydroquinone as substrates, the enzymatic reaction of peroxidase produced benzoquinone, which was subsequently
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