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282960

Sigma-Aldrich

Quinhydrone

97%

Synonym(s):

Hydroquinone: benzoquinone 1:1 complex

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25 G
$40.20
100 G
$127.00

About This Item

Linear Formula:
C6H4(OH)2 · C6H4O2
CAS Number:
106-34-3
Molecular Weight:
218.21
Beilstein/REAXYS Number:
3919222
EC Number:
203-387-6
MDL number:
MFCD00010310
UNSPSC Code:
12352100
PubChem Substance ID:
24857079
NACRES:
NA.22

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Quality Level

100

assay

97%

form

powder

composition

Carbon, 63.7-68.4%

mp

167-172 °C (lit.)

functional group

ketone

SMILES string

Oc1ccc(O)cc1.O=C2C=CC(=O)C=C2

InChI

1S/C6H6O2.C6H4O2/c2*7-5-1-2-6(8)4-3-5/h1-4,7-8H;1-4H

InChI key

BDJXVNRFAQSMAA-UHFFFAOYSA-N

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General description

Quinhydrone/methanol treatment for the measurement of carrier lifetime in crystalline silicon substrates has been reported[1]. Surface passivation of silicon substrates by quinhydrone/ethanol treatment has been investigated[2].

Application

Quinhydrone is a general reagent used in potentiometric titrations.[3][4] It can also be used as a π-acceptor in the formation of charge-transfer complex of analytes for spectrophotometric analysis.[5]

pictograms

Skull and crossbonesEnvironment
GHS06,GHS09

signalword

Danger

hcodes

H301,H400

Hazard Classifications

Acute Tox. 3 Oral - Aquatic Acute 1

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
STBL4802
STBL2422
STBL1959
STBK7438
STBK2682

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p-Benzosemiquinone radical anion on silver nanoparticles in water.
Tripathi G N R
Journal of the American Chemical Society, 125(5), 1178-1179 (2003)
Photoinduced electron transfer from porphyrin to C60 in a C60| porphyrin double-layer photoelectrochemical cell.
Takahashi K, et al.
Journal of Electroanalytical Chemistry, 426(1-2), 85-90 (1997)
Surface passivation effect of silicon substrates due to quinhydrone/ethanol treatment.
Takato H, et al.
Jpn J. App. Phys., Part I, 40(10A), L1003-L1003 (2001)
The effect of the hydrogen ion concentration upon the salt error of the quinhydrone electrode.
J L GABBARD
Journal of the American Chemical Society, 69(3), 533-536 (1947-03-01)
Cheng Zhao et al.
Journal of the American Society for Mass Spectrometry, 16(3), 409-416 (2005-03-01)
The influence of a number of redox reagents on the charge state distribution in nanoelectrospray mass spectrometry was examined using cytochrome c and ubiquitin. The redox active species investigated were: 1,4-benzoquinone, quinhydrone, tetracyanoquinodimethane (TCNQ), hydroquinone, and ascorbic acid. The redox
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Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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