Chemical identity

N-Nitroso Telmisartan EP Impurity A

CAS not listed · C19H19N5O

01Identity

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

Lazychem IDLC-32217
PubChem CID176478700
NameN-Nitroso Telmisartan EP Impurity A
CAS RNNot listed
Molecular formulaC19H19N5O
Molecular weight333.39 g/mol
IUPAC name1, 7'-Dimethyl-3'-nitroso-2'- propyl-1H, 3'H-2, 5'- bibenzo[d]imidazole
InChIKeyZHDKQKDBHUJUET-UHFFFAOYSA-N

02Structure identifiers

2D structurePubChem CID 176478700
Two-dimensional chemical structure of N-Nitroso Telmisartan EP Impurity A
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 4 rings, includes aromatic atoms, includes aliphatic carbon, contains an N-nitroso substructure. These statements are calculated from the published structure string.

Defined stereocentres0
Unassigned stereocentres0
Ring count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCCCC1=NC2=C(C)C=C(C3=NC4=CC=CC=C4N3C)C=C2N1N=O
InChINot listed
Formula from structureC19H19N5O
Molecular weight from structure333.39 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 N-Nitroso Telmisartan EP Impurity A 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 N-Nitroso Telmisartan EP Impurity A, 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
C18H16N6O2
Candidate SMILES
CCCc1nc2c(C)cc(-c3nc4ccccc4n3N=O)cc2n1N=O

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 FOUNDNo CAS number is available for an exact comparison.
SCOMETNO EXACT REVIEWED CAS MATCHNo CAS number is available for an exact comparison.
Review date2026-08-01Recheck the current official instruments for the material, concentration, activity and date in question.

05Names and relationships

Associated parent compound

Telmisartan

View API and impurity family

Other names

  • N-Nitroso Telmisartan Related Compound A

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