ChemicalBook > CAS DataBase List > Pyridine-N-oxide

Pyridine-N-oxide

Product Name
Pyridine-N-oxide
CAS No.
694-59-7
Chemical Name
Pyridine-N-oxide
Synonyms
Pyridine oxide;PYRIDINE-1-OXIDE;pyridineoxide;Pyridin-N-oxid;Pyridne-N-Oxide;1-oxidePyridine;N- oxidopyridin;PYRIDINE-N-OXIDE;Pyridine-N-Oxidee;3-PICOLIN-N-OXIDE
CBNumber
CB6293240
Molecular Formula
C5H5NO
Formula Weight
95.1
MOL File
694-59-7.mol
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Pyridine-N-oxide Property

Melting point:
62-67 °C(lit.)
Boiling point:
270 °C(lit.)
Density 
1.1418 (rough estimate)
refractive index 
1.5939 (estimate)
Flash point:
143 °C
storage temp. 
2-8°C
form 
Crystalline Solid, Crystals, and/or Chunks
pka
0.79(at 24℃)
color 
White to brownish
Water Solubility 
soluble
Sensitive 
Hygroscopic
Merck 
14,7972
BRN 
105257
CAS DataBase Reference
694-59-7(CAS DataBase Reference)
NIST Chemistry Reference
Pyridine, 1-oxide(694-59-7)
EPA Substance Registry System
Pyridine, 1-oxide (694-59-7)
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Safety

Hazard Codes 
Xi,Xn
Risk Statements 
36/37/38-22-40-20/21/22
Safety Statements 
26-24/25-37/39-36/37/39-22
WGK Germany 
3
RTECS 
UT6410000
F 
21
TSCA 
Yes
HS Code 
29333999
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H301Toxic if swalloed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
131652
Product name
Pyridine N-oxide
Purity
95%
Packaging
25g
Price
$42.2
Updated
2025/07/31
Sigma-Aldrich
Product number
131652
Product name
Pyridine N-oxide
Purity
95%
Packaging
100g
Price
$97.1
Updated
2025/07/31
TCI Chemical
Product number
P0557
Product name
Pyridine N-Oxide
Purity
>98.0%(T)
Packaging
25g
Price
$36
Updated
2025/07/31
TCI Chemical
Product number
P0557
Product name
Pyridine N-Oxide
Purity
>98.0%(T)
Packaging
100g
Price
$103
Updated
2025/07/31
TCI Chemical
Product number
P0557
Product name
Pyridine N-Oxide
Purity
>98.0%(T)
Packaging
500g
Price
$309
Updated
2025/07/31
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Pyridine-N-oxide Chemical Properties,Usage,Production

Chemical Properties

White to light yellow solid

Uses

Pyridine N-Oxide is a useful reagent for the chemical industry, a mild reoxidant that transforms osmium-catalyzed oxidative cyclization. A catalytic agent.

Uses

Intermediate.

Definition

ChEBI: The pyridine N-oxide derived from the parent pyridine. It is a drug metabolite of the antihypertensive agent pinacidil.

Synthesis Reference(s)

Organic Syntheses, Coll. Vol. 4, p. 828, 1963
Tetrahedron Letters, 12, p. 2807, 1971 DOI: 10.1016/S0040-4039(01)97047-9

General Description

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

Hazard

Probably flammable and toxic.

Purification Methods

Purify the N-oxide by crystallisation from Et2O and by vacuum sublimation. The picrolonate has m 182-184o. [Katritzky J Chem Soc 2407 1956, Beilstein 20 III/IV 2305, 20/5 V 217.]

Pyridine-N-oxide Preparation Products And Raw materials

Raw materials

Preparation Products

4-BENZYLOXY-2(1 H)-PYRIDONE 4-CHLORO-PYRIDINE-2-CARBONITRILE 4-Aminopyridine
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View Lastest Price from Pyridine-N-oxide manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD
Product
Pyridine-N-oxide 694-59-7
Price
US $0.00/KG
Min. Order
1KG
Purity
98%min
Supply Ability
30tons/month
Release date
2023-02-08
Hebei Chuanghai Biotechnology Co., Ltd
Product
Pyridine-N-oxide 694-59-7
Price
US $0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
10 mt
Release date
2024-11-11
Henan Aochuang Chemical Co.,Ltd.
Product
Pyridine-N-oxide 694-59-7
Price
US $0.00-0.00/KG
Min. Order
1KG
Purity
98%
Supply Ability
1ton
Release date
2022-10-13

694-59-7, Pyridine-N-oxideRelated Search:

Pyridine-4-carboxylic acid N-oxide Pyridine hydrochloride 2,6-Pyridinedicarbonitrile 4-Pyridinesulfonamide(6CI,9CI) 2,3,5,6-Tetraaminopyridine trihydrochloride Pyridine trifluoroacetate PYRIDINE-2-THIOAMIDE 2-Pyridinesulfonamide(6CI,7CI,9CI) dimethyl pyridine-3,5-dicarboxylate METHYL ISONICOTINATE 2-Pyridinecarbaldehyde oxime PYRIDINE-2-SULFONYL FLUORIDE PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE Pyridine hydrobromide Pyridine-4-boronic acid Pyridine sulfur trioxide 4-Picoline-N-oxide Sodium Pyrithione

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