Chemical identity

Alimemazine Hemitartrate EP Impurity C / Promethazine EP Impurity A / Promethazine BP Impurity A / Phenothiazine

CAS 92-84-2 · C12H9NS

01Identity

Identifiers and names for this exact compound. Empty fields are left unassigned.

Lazychem IDLC-05424
PubChem CID7108
NameAlimemazine Hemitartrate EP Impurity C / Promethazine EP Impurity A / Promethazine BP Impurity A / Phenothiazine
CAS RN92-84-2
Molecular formulaC12H9NS
Molecular weight199.27 g/mol
IUPAC name10H-phenothiazine
InChIKeyWJFKNYWRSNBZNX-UHFFFAOYSA-N

02Structure identifiers

2D structurePubChem CID 7108
Two-dimensional chemical structure of Alimemazine Hemitartrate EP Impurity C / Promethazine EP Impurity A / Promethazine BP Impurity A / Phenothiazine, CAS 92-84-2
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 3 rings, includes aromatic atoms. These statements are calculated from the published structure string.

Defined stereocentres0
Unassigned stereocentres0
Ring count3
Secondary amines1
Tertiary amines0
N-methyl amine sites0
SMILESC12=CC=CC=C1NC3=C(C=CC=C3)S2
InChINot listed
Formula from structureC12H9NS
Molecular weight from structure199.27 g/mol

03Possible N-nitroso structures

Shown for structural screening only. These candidates are not confirmed impurities, formation predictions or analytical findings.

Matched amine site1 candidate
Chemical structure of Alimemazine Hemitartrate EP Impurity C / Promethazine EP Impurity A / Promethazine BP Impurity A / Phenothiazine with the matched amine site highlighted in amber
Amber identifies the screened atom and adjacent bonds.
Possible structure candidateUnverified identity
First calculated possible N-nitroso structure derived from Alimemazine Hemitartrate EP Impurity C / Promethazine EP Impurity A / Promethazine BP Impurity A / Phenothiazine, with the new N-nitroso group highlighted in amber
The new N-N=O atoms and bonds are highlighted. No CAS number or compound name is assigned by this calculation.
Candidate 1Possible N-nitroso structural candidate
Calculated formula
C12H8N2OS
Candidate SMILES
O=NN1c2ccccc2Sc2ccccc21

Interpretation: A structural alert alone does not establish that a nitrosamine forms. Evaluate nitrite sources, amine reagents, pH, temperature, process sequence, purge and analytical evidence.

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 / RCSNO EXACT MATCH FOUNDCAS 92-84-2 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 92-84-2 has no exact match in the reviewed SCOMET list.
Review date2026-08-01Recheck the current official instruments for the material, concentration, activity and date in question.

05Names and relationships

Associated parent compound

Promethazine / Alimemazine Hemitartrate

View API and impurity family

Other names

  • Promethazine EP Impurity A
  • Dibenzothiazine
  • Feeno
  • Fenoverm
  • Nemazene
  • Nexarbol
  • Orimon
  • Padophene
  • Penthazine
  • Phenegic
  • Phenoverm
  • Phenovis

Related records from the same parent family

06Documented history

Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.

No dated history available

No verified discovery, first report, occurrence, use or issue event is currently available for this identity.

07Sources