Chemical identity
3,5-Dichloro-4-pyridone
CAS 17228-71-6 · C5H3Cl2NO
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-09747 |
|---|---|
| PubChem CID | 87011 |
| Name | 3,5-Dichloro-4-pyridone |
| CAS RN | 17228-71-6 |
| Molecular formula | C5H3Cl2NO |
| Molecular weight | 163.99 g/mol |
| IUPAC name | 3,5-dichloropyridin-4-ol |
| InChIKey | YKCQWIYRLMNGMO-UHFFFAOYSA-N |
02Structure identifiers

Structure facts for this exact identity.
| Molecular formula | C5H3Cl2NO |
|---|---|
| InChIKey | YKCQWIYRLMNGMO-UHFFFAOYSA-N |
| Ring count | 1 |
| Defined stereocentres | 0 |
| Unassigned stereocentres | 0 |
| SMILES | C1=C(C(=O)C(=CN1)Cl)Cl |
|---|---|
| InChI | InChI=1S/C5H3Cl2NO/c6-3-1-8-2-4(7)5(3)9/h1-2H,(H,8,9) |
03India status for this compound
These results apply only to this exact compound name and CAS number. Confirm the current official instruments before making a regulatory decision.
| NDPS / RCS | NOT FOUND IN REVIEWED ENTRIES | CAS 17228-71-6 was not found in the reviewed exact-identity entries. Generic, class, analogue, salt and isomer provisions were not evaluated. |
|---|---|---|
| SCOMET | NOT FOUND IN REVIEWED CAS ENTRIES | CAS 17228-71-6 was not found in the reviewed exact-CAS mapping. Generic and analogue entries were not evaluated. |
- Narcotic Drugs and Psychotropic Substances Act, 1985, ScheduleDepartment of Revenue, Government of India · source version 1985-09-16
- Controlled-substances notifications and amendmentsDepartment of Revenue, Government of India · source version 2026-03-11
- Appendix 3, SCOMET ListDirectorate General of Foreign Trade, Government of India · source version 2024-09-02
04Names and relationships
Associated parent compound
Cefazedone
View API and impurity familyOther names
- Cefazedone Impurity 16
- 3,5-Dichloro-4(1H)-pyridinone
- EINECS 241-267-5
- 3,5-Dichloropyridin-4-ol
- 3,5-Dichloro-4-hydroxypyridine
- 3,5-dichloro-1H-pyridin-4-one
- 3,5-Dichloro-4-pyridinol
05Documented history
Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.
No verified discovery, first report, occurrence, use or issue event is currently available for this identity.
06Sources
- S01PubChem compound record, CID 87011
Names and machine-readable chemical identity properties.
- S02NCBI website and molecular data policies
Reuse policy for NCBI molecular data. This page does not reproduce vendor descriptions or contributed narrative text.
- S03Narcotic Drugs and Psychotropic Substances Act, 1985, Schedule
Department of Revenue, Government of India. Used for the exact-compound India status shown on this page.
- S04Controlled-substances notifications and amendments
Department of Revenue, Government of India. Used for the exact-compound India status shown on this page.
- S05Appendix 3, SCOMET List
Directorate General of Foreign Trade, Government of India. Used for the exact-compound India status shown on this page.
