Chemical identity
Paracetamol EP Impurity E/ 4'-Hydroxy acetophenone
CAS 99-93-4 · C₈H₈O₂
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-24682 |
|---|---|
| PubChem CID | 7469 |
| Name | Paracetamol EP Impurity E/ 4'-Hydroxy acetophenone |
| CAS RN | 99-93-4 |
| Molecular formula | C₈H₈O₂ |
| Molecular weight | 136.15 g/mol |
| IUPAC name | 1-(4-hydroxyphenyl)ethan-1-one |
| InChIKey | TXFPEBPIARQUIG-UHFFFAOYSA-N |
02Structure identifiers

The parsed structure contains 1 ring, includes aromatic atoms, includes aliphatic carbon. These statements are calculated from the published structure string.
| Defined stereocentres | 0 |
|---|---|
| Unassigned stereocentres | 0 |
| Ring count | 1 |
| Secondary amines | 0 |
| Tertiary amines | 0 |
| N-methyl amine sites | 0 |
| SMILES | CC(=O)C1=CC=C(C=C1)O |
|---|---|
| InChI | Not listed |
| Formula from structure | C₈H₈O₂ |
| Molecular weight from structure | 136.15 g/mol |
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 | NO EXACT MATCH FOUND | CAS 99-93-4 has no exact match in the reviewed published schedule. |
|---|---|---|
| SCOMET | NO EXACT REVIEWED CAS MATCH | CAS 99-93-4 has no exact match in the reviewed SCOMET list. |
| Review date | 2026-08-01 | Recheck the current official instruments for the material, concentration, activity and date in question. |
- Narcotic Drugs and Psychotropic Substances Act, 1985, ScheduleDepartment of Revenue, Government of India · reviewed 2026-08-01
- Controlled-substances notifications and amendmentsDepartment of Revenue, Government of India · reviewed 2026-08-01
- Appendix 3, SCOMET ListDirectorate General of Foreign Trade, Government of India · reviewed 2026-08-01
04Names and relationships
Associated parent compound
Paracetamol
View API and impurity familyOther names
- Paracetamol EP Impurity E
- 1-(4-Hydroxyphenyl)ethanone
- 4-Acetophenol
- 4-Acetylphenol
- 4-Hydroxyphenyl Methyl Ketone
- Methyl 4-Hydroxyphenyl Ketone
- Piceol
- p-Acetophenol
- p-Acetylphenol
- p-Hydoxyacetophenone
- 4'-Hydroxy acetophenone
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 7469
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.
