Chemical identity

Omeprazole EP Impurity H / Omeprazole BP Impurity H/ 4-Desmethoxy-4-chloro Omeprazole/ 4-Chloro Omeprazole (Free Base)

CAS 863029-89-4 · C16H16ClN3O2S

01Identity

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

Lazychem IDLC-24105
PubChem CID29977366
NameOmeprazole EP Impurity H / Omeprazole BP Impurity H/ 4-Desmethoxy-4-chloro Omeprazole/ 4-Chloro Omeprazole (Free Base)
CAS RN863029-89-4
Molecular formulaC16H16ClN3O2S
Molecular weight349.84 g/mol
IUPAC name2-[(RS)-[(4-Chloro-3,5-dimethylpyridin-2- yl)methyl]sulfinyl]-5-methoxy-1H-benzimidazole
InChIKeyLZEPUBIBIWJUSW-HSZRJFAPSA-N

02Structure identifiers

2D structurePubChem CID 29977366
Two-dimensional chemical structure of Omeprazole EP Impurity H / Omeprazole BP Impurity H/ 4-Desmethoxy-4-chloro Omeprazole/ 4-Chloro Omeprazole (Free Base), CAS 863029-89-4
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, includes aliphatic carbon, has 1 defined stereocentre, contains at least one halogen atom. These statements are calculated from the published structure string.

Defined stereocentres1
Unassigned stereocentres0
Ring count3
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCC1=CN=C(C(=C1Cl)C)C[S@@](=O)C2=NC3=C(N2)C=C(C=C3)OC
InChINot listed
Formula from structureC16H16ClN3O2S
Molecular weight from structure349.84 g/mol

03Stereochemistry

The published structure contains 1 defined and 0 unassigned tetrahedral stereocentre. The exact wedge and dash depiction is shown above.

Defined centres1Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 2Before symmetry reduction

Published same-connectivity configurations

3 records

These records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

Scope: The mathematical 2^n value is only an upper bound. Symmetry and other stereogenic elements can change the number of distinct stereoisomers. A hypothetical configuration is not published as a compound record without a verified structure identity.

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 863029-89-4 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 863029-89-4 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

Omeprazole

View API and impurity family

Other names

  • Omeprazole EP Impurity H
  • 4-Desmethoxy-4-chloroomeprazole
  • 1H-Benzimidazole, 2-(((4-chloro-3,5-dimethyl-2-pyridinyl)methyl)sulfinyl)-6-methoxy-
  • 4-Chloro Omeprazole
  • Omeprazole BP Impurity H

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