C5H4ClNO
129.54 g/mol
Pharmaceutical IntermediateWarning
4-Chloropyridine N-oxide
CAS1121-76-2EC214-336-2
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
4-Chloropyridine N-oxide is a chemical compound used as an intermediate in pharmaceutical manufacturing. It features a pyridine ring with a chlorine substituent and an N-oxide functional group.
pharmaceutical intermediate
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
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Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4-Chloropyridine N-oxide (CAS 1121-76-2) is 2933.39.
HS code (international, 6-digit)
2933.39
EU CN code (8-digit)
2933 39 99
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
4-chloro-1-oxidopyridin-1-ium
InChIKey
DPJVRASYWYOFSJ-UHFFFAOYSA-N
SMILES
C1=C[N+](=CC=C1Cl)[O-]
Synonyms (15)
- 4-Chloropyridine 1-oxide
- 4-Chloropyridine N-oxide
- 4-Chloropyridine oxide
- 4-chloro-1-oxidopyridin-1-ium
- 4-chloropiridine-N-oxide
- 4-chloropyridin-1-ium-1-olate
- 4-chloropyridin-1-ol
- CHLOROPYRIDINE N-OXIDE, 4-
- Caswell No. 215A
- Pyridine, 4-chloro-, 1-oxide
- TH 285N
- pyridine 1-oxide, 4-chloro-
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