Cas no 1121-76-2 (4-Chloropyridine N-oxide)

4-Chloropyridine N-oxide is a versatile heterocyclic compound characterized by the presence of a chlorine substituent at the 4-position and an N-oxide functional group. This structure imparts unique reactivity, making it a valuable intermediate in organic synthesis, particularly in the preparation of pharmaceuticals, agrochemicals, and ligands for catalysis. The electron-withdrawing effects of both the chlorine and N-oxide groups enhance its utility in nucleophilic substitution and cross-coupling reactions. Its stability under standard conditions and compatibility with a range of solvents further contribute to its practicality in laboratory and industrial applications. The compound is also employed in the study of oxidation mechanisms and as a building block for more complex nitrogen-containing molecules.

4-Chloropyridine N-oxide structure

Product Name:4-Chloropyridine N-oxide

CAS No:1121-76-2

MF:C₅H₄ClNO

MW:129.544360160828

MDL:MFCD00047425

CID:40809

PubChem ID:24853896

Update Time:2025-05-27

4-Chloropyridine N-oxide Chemical and Physical Properties

Names and Identifiers

- 4-chloropyridine N-oxide
- Chloropyridineoxide
- 4-Chloro-pyridine 1-oxide
- 4-Chloropyridine 1-oxide
- 4-Chloro-pyridine N-oxide
- 4-Chloropyridine-N-oxide
- Pyridine, 4-chloro-,1-oxide
- Pyridine,4-chloro-, oxide (6CI)
- 4-Chloropyridine oxide
- NSC 5074
- TH 285N
- Pyridine, 4-chloro-, 1-oxide
- 4-Chloropuridine N-Oxide
- 4-chloropyridin-1-ol
- PubChem19817
- 4-chloropiridine-N-oxide
- 4-Chloropyridine, N-oxide
- DSSTox_RID_79758
- DSSTox_CID_21513
- DSSTox_GSID_41513
- KSC507M9L
- F3196UEB9Q
- 4-chloro-1-oxidopyridin-1-ium
- 4-chloropyr
- FT-0633358
- EN300-7403302
- DTXSID0041513
- AKOS015850307
- Tox21_300883
- BB 0256850
- NS00023605
- I10225
- MFCD00047425
- SCHEMBL133666
- CHLOROPYRIDINE N-OXIDE, 4-
- AS-19977
- CHEMBL3186776
- NCGC00254787-01
- NCGC00248202-01
- 10.14272/DPJVRASYWYOFSJ-UHFFFAOYSA-N
- J-002720
- DPJVRASYWYOFSJ-UHFFFAOYSA-N
- NSC-5074
- 4-chloropyridin-1-ium-1-olate
- DTXCID8021513
- Q27277564
- 4-Chloropyridine N-oxide, 98%
- 4-Chloropyridine1-oxide
- CAS-1121-76-2
- AM90667
- NSC5074
- 1121-76-2
- 4-chloro Pyridine- N-Oxide
- doi:10.14272/DPJVRASYWYOFSJ-UHFFFAOYSA-N.1
- EINECS 214-336-2
- pyridine 1-oxide, 4-chloro-
- UNII-F3196UEB9Q
- 4-Chloropyridine Oxide; NSC 5074; TH 285N; 4-Chloropyridine 1-Oxide
- EPA Pesticide Chemical Code 069204
- DB-003961
- Caswell No. 215A
- 214-336-2
- 4-Chloropyridine N-oxide
- MDL： MFCD00047425
- Inchi： 1S/C5H4ClNO/c6-5-1-3-7(8)4-2-5/h1-4H
- InChI Key： DPJVRASYWYOFSJ-UHFFFAOYSA-N
- SMILES： ClC1C=C[N+](=CC=1)[O-]

Computed Properties

Exact Mass: 128.99800
Monoisotopic Mass: 128.998
Isotope Atom Count: 0
Hydrogen Bond Donor Count: 0
Hydrogen Bond Acceptor Count: 1
Heavy Atom Count: 8
Rotatable Bond Count: 0
Complexity: 70.8
Covalently-Bonded Unit Count: 1
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count : 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Surface Charge: 0
Tautomer Count: nothing
XLogP3: 0
Topological Polar Surface Area: 25.5

Experimental Properties

Color/Form: Not determined
Density: 1.27
Melting Point: 160?°C (dec.) (lit.)
Boiling Point: 310 °C at 760 mmHg
Flash Point: 141.3 °C
Refractive Index: 1.552
PSA: 25.46000
LogP: 1.76850
Sensitiveness: Sensitive to heat, humidity and air
Solubility: Not determined

4-Chloropyridine N-oxide Security Information

Symbol:
Prompt：warning
Signal Word：Warning
Hazard Statement： H315,H319,H335
Warning Statement： P261,P305+P351+P338
Hazardous Material transportation number：NONH for all modes of transport
WGK Germany：3
Hazard Category Code： 36/37/38
Safety Instruction： S26-S37/39-S36/37/39
Hazardous Material Identification：
Safety Term：S26;S36/37/39
Risk Phrases：R20/21/22; R36/37/38
HazardClass：IRRITANT
Storage Condition：2-8°C

4-Chloropyridine N-oxide Customs Data

HS CODE：2933399090
Customs Data：

China Customs Code:
2933399090

Overview:

2933399090. Other compounds with non fused pyridine rings in structure. VAT:17.0%. Tax refund rate:13.0%. Regulatory conditions:nothing. MFN tariff:6.5%. general tariff:20.0%

Declaration elements:

Product Name, component content, use to, Please indicate the appearance of Urotropine, 6- caprolactam please indicate the appearance, Signing date

Summary:

2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

4-Chloropyridine N-oxide Pricemore >>

Related Categories	No.	Product Name	Cas No.	Purity	Specification	Price	update time
Fluorochem	046924-1g	4-Chloropyridine-N-oxide	1121-76-2	95%	1g	￡10.00	2022-03-01
Fluorochem	046924-5g	4-Chloropyridine-N-oxide	1121-76-2	95%	5g	￡40.00	2022-03-01
Fluorochem	046924-25g	4-Chloropyridine-N-oxide	1121-76-2	95%	25g	￡151.00	2022-03-01
SHANG HAI A LA DING SHENG HUA KE JI GU FEN Co., Ltd.	C124261-25g	4-Chloropyridine N-oxide	1121-76-2	97%	25g	￥1160.90	2023-09-03
SHANG HAI A LA DING SHENG HUA KE JI GU FEN Co., Ltd.	C124261-5g	4-Chloropyridine N-oxide	1121-76-2	97%	5g	￥290.90	2023-09-03
SHANG HAI YI EN HUA XUE JI SHU Co., Ltd.	R005952-25g	4-Chloropyridine N-oxide	1121-76-2	98%	25g	￥1046	2024-05-26
SHANG HAI YI EN HUA XUE JI SHU Co., Ltd.	R005952-5g	4-Chloropyridine N-oxide	1121-76-2	98%	5g	￥266	2024-05-26
TRC	C596215-50mg	4-Chloropyridine N-Oxide	1121-76-2		50mg	$ 58.00	2023-09-08
TRC	C596215-100mg	4-Chloropyridine N-Oxide	1121-76-2		100mg	$ 75.00	2023-09-08
TRC	C596215-500mg	4-Chloropyridine N-Oxide	1121-76-2		500mg	$ 115.00	2023-09-08

4-Chloropyridine N-oxide Suppliers

Tiancheng Chemical (Jiangsu) Co., Ltd

Gold Member

Audited Supplier

(CAS:1121-76-2)4-氯吡啶 N-氧化物

Order Number:LE27065942

Stock Status:in Stock

Quantity:25KG,200KG,1000KG

Purity:99%

Pricing Information Last Updated:Friday, 20 June 2025 13:04

Price ($):discuss personally

Email:[email protected]

4-Chloropyridine N-oxide Related Literature

1. Chlorine-35 nuclear quadrupole resonance study of molecular torsional motion in some chloropyridine-N-oxides and chloroquinoline-N-oxides

P. S. Raghoottama,S. Soundararajan,J. Ramakrishna J. Chem. Soc. Faraday Trans. 2 1989 85 131
2. Relative stability constants of the uranyl tropolonate system with neutral ligands in benzene

Sandro Degetto,Livio Baracco,Giampaolo Marangoni,Eloisa Celon J. Chem. Soc. Dalton Trans. 1976 1645
3. FTIR investigation of O···H···O hydrogen bonds with large proton polarizability in sulfonic acid–N-oxide systems in the middle and far-IR

Roland Langner,Georg Zundel J. Chem. Soc. Faraday Trans. 1998 94 1805
4. Silver catalyzed decarboxylative acylation of pyridine-N-oxides using α-oxocarboxylic acids

Rajendran Suresh,Rajendran Senthil Kumaran,Vajiram Senthilkumar,Shanmugam Muthusubramanian RSC Adv. 2014 4 31685
5. Efficient, mild and completely regioselective synthesis of substituted pyridines

Hans Andersson,Thomas Sainte-Luce Banchelin,Sajal Das,Roger Olsson,Fredrik Almqvist Chem. Commun. 2010 46 3384

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