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131652

Sigma-Aldrich

Pyridine N-oxide

95%

Synonym(s):

Pyridine oxide

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About This Item

Empirical Formula (Hill Notation):
C5H5NO
CAS Number:
694-59-7
Molecular Weight:
95.10
Beilstein:
105257
EC Number:
211-774-6
MDL number:
MFCD00006194
UNSPSC Code:
12352100
PubChem Substance ID:
24848028
NACRES:
NA.22
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Quality Level

100

Assay

95%

form

solid

bp

270 °C (lit.)

mp

62-67 °C (lit.)

SMILES string

[O-][n+]1ccccc1

InChI

1S/C5H5NO/c7-6-4-2-1-3-5-6/h1-5H

InChI key

ILVXOBCQQYKLDS-UHFFFAOYSA-N

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General description

Pyridine N-oxide axle with [2]rotaxanes was synthesized via an anion templated threading-followed-by-stoppering strategy[1].

Application

Pyridine N-oxide was used to study the FTIR spectra of pyridine N-oxide in acetonitrile[2].

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

289.4 °F - closed cup

Flash Point(C)

143 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
WXBF5351V
WXBF4147V
WXBF0278V
WXBF2220V
WXBD7748V

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Highly efficient gold nanoparticle catalyzed deoxygenation of amides, sulfoxides, and pyridine N-oxides.
Yusuke Mikami et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 17(6), 1768-1772 (2011-01-29)
Jan Balzarini et al.
The Journal of antimicrobial chemotherapy, 55(2), 135-138 (2005-01-15)
Pyridine N-oxide derivatives represent a new class of anti-HIV compounds, for which some members exclusively act through inhibition of HIV-1 reverse transcriptase and thus characteristically behave as non-nucleoside reverse transcriptase inhibitors. Other members act, additionally or alternatively, at a post-integrational
G Pitsevich et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 120, 585-594 (2014-01-01)
FTIR spectra of pyridine N-oxide and trichloroacetic acid H-bonded complex in acetonitrile were studied at 20 and 50°C. The calculations of equilibrium configurations of the complex and their IR spectra in harmonic- and anharmonic approximations were carried out at the
Masahito Murai et al.
Chemical communications (Cambridge, England), 48(61), 7622-7624 (2012-06-26)
Gold(I)-catalysed tandem oxygen-transfer/cycloisomerisation reaction of 2-(2-propynyl)pyridine N-oxides provides an atom-economical route to indolizinone frameworks.
Santiago Barroso et al.
Organic letters, 13(3), 402-405 (2010-12-24)
Enantioselective nitrone cycloadditions with 2-alkenoyl pyridine N-oxides as dipolarophiles have been reported. The reaction is catalyzed by Cu(II)-BOX complexes to give the expected isoxazolidine products with high diastereo- and enantioselectivity.
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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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