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Merck
CN

53960

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
EC Number:
204-617-8
UNSPSC Code:
12352200
MDL number:
MFCD00002339
Beilstein/REAXYS Number:
605970

Key Documents

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InChI

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

InChI key

QIGBRXMKCJKVMJ-UHFFFAOYSA-N

SMILES string

Oc1ccc(O)cc1

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

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flash_point_c

165 °C - closed cup

signalword

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

11 - Combustible Solids

wgk

WGK 3

flash_point_f

329.0 °F - closed cup

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Regulatory Information

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Félix A Urra et al.
Toxicology and applied pharmacology, 267(3), 218-227 (2013-01-22)
Tumor cells present a known metabolic reprogramming, which makes them more susceptible for a selective cellular death by modifying its mitochondrial bioenergetics. Anticancer action of the antioxidant 9,10-dihydroxy-4,4-dimethyl-5,8-dihydroanthracen-1(4H)-one (HQ) on mouse mammary adenocarcinoma TA3, and its multiresistant variant TA3-MTXR, were
Pearl Grimes et al.
Cutis, 91(1), 47-54 (2013-03-07)
We sought to evaluate the efficacy and tolerability of treating melasma using a 4% hydroquinone skin care system, including a proprietary cleanser, toner, 4% hydroquinone, exfoliation enhancer, and sunscreen, plus tretinoin cream 0.025%. Together these products offer not only treatment
Huan Wang et al.
Analytical biochemistry, 434(1), 123-127 (2012-12-04)
Due to high sensitivity and good selectivity, electrochemical immunosensor is often used to detect tumor markers. Prostate-specific antigen (PSA) is the most validated tumor marker for prostate cancer. In this work, mesoporous silica nanoparticles (MSNs) were used to increase the
Lisa Zaleski et al.
Journal of drugs in dermatology : JDD, 11(11), 1316-1320 (2012-11-09)
Melasma is a complex multifactorial disorder whose pathogenesis is not well understood. In addition to increased pigmentation, increased vascularity associated with pigmentation is present. A variety of topical treatments targeting pigmentation are available with temporary improvement of mainly the epidermal
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
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