4-Chloropyridine N-oxide
4-Chloropyridine N-oxide (CAS: 1121-76-2) is a heterocyclic organic compound with the molecular formula C5H4ClNO and a molecular weight of 129.54 g/mol. This pyridine derivative serves as a valuable building block in chemical synthesis, particularly in the field of halogenated heterocycles. It functions as an oxidising agent in specific chemical reactions. Tech Serve Solutions supplies this compound with a high purity assay.

Oxidising Agent in Complex Synthesis
4-Chloropyridine N-oxide has been utilised as a source of oxygen in the preparation of complex metal-organic compounds, such as iron-containing complexes. Its controlled reactivity makes it suitable for specific oxidation steps in multi-stage syntheses.
Heterocyclic Chemistry Intermediate
As a substituted pyridine N-oxide, this compound is a useful intermediate for synthesising more complex heterocyclic molecules. The presence of the chlorine atom and the N-oxide functionality allows for various chemical transformations.
Research and Development
It finds application in academic and industrial research laboratories for exploring new synthetic pathways and developing novel chemical entities. Its well-defined structure aids in predictable reaction outcomes.
| Molecular weight | 129.54 |
|---|---|
| Empirical formula | C5H4ClNO |
| Assay | 98% |
| Storage temperature | 2-8°C |
| Application | 4-Chloropyridine N-oxide was used as oxygen source in the preparation of [(N,N′-bis(2-methyl-2-mercaptopropane)-1,5-diazacyclooctane)Fe]2O complexes1. |
| Melting point | 160 °C (dec.)(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-Chloropyridine N-oxide used for?
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4-Chloropyridine N-oxide is primarily used as a building block in chemical synthesis, notably as an oxygen source in the preparation of certain metal complexes and as an intermediate for creating more complex heterocyclic structures.
What is the CAS number and chemical formula for 4-Chloropyridine N-oxide?
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The CAS number is 1121-76-2, and the chemical formula is C5H4ClNO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Chloropyridine N-oxide with an assay of 98%. This is suitable for research and general chemical synthesis purposes; we do not represent it as meeting pharmacopoeial standards (e.g., USP, EP, BP).
What are the main safety considerations when handling 4-Chloropyridine N-oxide?
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4-Chloropyridine N-oxide is classified as a Warning substance. It can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including Eyeshields, Gloves, and a dust mask type N95, should be used. Handle in a well-ventilated area.
How is 4-Chloropyridine N-oxide packaged and shipped?
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Tech Serve Solutions exports fine chemicals globally, adhering to all relevant shipping and handling regulations. Specific packaging details are confirmed upon order placement.
How can I request a quote or sample for 4-Chloropyridine N-oxide?
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To request a quote or a sample, please contact our sales team via the details provided on the Tech Serve Solutions website, referencing the product name and CAS number.
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