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Proton-pump inhibitorsIn stockImpurity reference standardPh. Eur.

Omeprazole Impurity E

JR-PP1001-03

Variant ofOmeprazole Sodium BP CRS

Omeprazole N-oxide (4-methoxy-2-(((5-methoxy-1H-benzimidazol-2-yl)sulfinyl)methyl)-3,5-dimethylpyridine 1-oxide; EP Impurity E); pyridine-ring N-oxidation impurity of omeprazole.

Structure & identifiers

2D structure — select to enlarge

Catalogue code
JR-PP1001-03
Category
Proton-pump inhibitors
CAS number
176219-04-8
Grade
Impurity reference standard
Pharmacopoeia
Ph. Eur.
Molecular formula
C17H19N3O4S
Molecular weight
361.42 g/mol
Pack sizes
25 mg · 50 mg · 100 mg · 500 mg
Record updated
12 Nov 2026

Chemical name

Omeprazole Impurity E

SMILES

COc1ccc2[nH]c(S(=O)Cc3c(C)c(OC)c(C)c[n+]3[O-])nc2c1

Compound identity, CAS number, formula and structure are referenced from public chemical databases. Contact us to confirm availability, pack sizes and documentation for your order.

Omeprazole Impurity E

25 mg · ×1