PRODUCT NAME: Esomeprazole EP Impurity B
Date of Mfg: Sample COA	RETEST DATE: Sample COA

Catalogue Number	OMP-011
Item/Batch Number	Sample COA
Quantity	Sample COA
CAS Number	110374-16-8
Mol. Formula	C₁₆H₁₇N₃O₂S
Molecular Wt	315.39
IUPAC	2-[(3,5-dimethylpyridin-2-yl)methylsulfinyl]-6-methoxy-1H-benzimidazole
Synonyms	2-[[(3,5-Dimethyl-2-pyridinyl)methyl]sulfinyl]-6-methoxy-1H-benzimidazole; Omeprazole EP Impurity B; 4-Desmethoxy Omeprazole
Long Term Storage Condition	2-8°C Refrigerator
Handling instruction	Sample COA

Test	Results
Appearance	Pale Beige to Light Brown Solid
Identification by 13C NMR	Sample COA
Identification by HNMR	Sample COA
Identification By IR	Sample COA
Mass (ESI)	Sample COA
Solubility	Chloroform (Slightly), DMSO (Slightly), Methanol (Slightly)
Purity	98 % by HPLC
Analysis Date (Release Date)	Sample COA
Attachments	Sample COA
Other Information	Sample COA
Note: This material can be used as a referance standard and is for research purpose ONLY and not for human consumption