Chemical identity
Ranitidine EP Impurity K
CAS 61832-41-5 · C4H8N2O2S
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-26736 |
|---|---|
| PubChem CID | 3035401 |
| Name | Ranitidine EP Impurity K |
| CAS RN | 61832-41-5 |
| Molecular formula | C4H8N2O2S |
| Molecular weight | 148.48 |
| IUPAC name | N-Methyl-1-methylthio-2-nitroethenamine |
| InChIKey | YQFHPXZGXNYYLD-ONEGZZNKSA-N |
02Structure identifiers

Structure facts for this exact identity.
| Molecular formula | C4H8N2O2S |
|---|---|
| InChIKey | YQFHPXZGXNYYLD-ONEGZZNKSA-N |
| Ring count | 0 |
| Defined stereocentres | 0 |
| Unassigned stereocentres | 0 |
| SMILES | O=[N+](/C=C(NC)/SC)[O-] |
|---|---|
| InChI | InChI=1S/C4H8N2O2S/c1-5-4(9-2)3-6(7)8/h3,5H,1-2H3/b4-3+ |
03Possible N-nitroso structures
A record-level structural review indicates a possible N-nitroso candidate. This is not a confirmed impurity, formation prediction or analytical finding.
A structural result alone does not establish that a nitrosamine forms. A process-specific and analytical assessment is required.
04India 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 61832-41-5 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 61832-41-5 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
05Names and relationships
Associated parent compound
Ranitidine; Nizatidine
View API and impurity familyOther names
- 1-Methylthio-1-methylamino-2-nitroethylene
- 2-methylamino-2-methylthio-1-nitroethylene
- Ranitidine BP Impurity K
- Ranitidine EP Impurity K / Ranitidine BP Impurity K/ Nizatidine EP Impurity B
06Documented 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.
07Sources
- S01PubChem compound record, CID 3035401
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.
