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
Water content by KF/TGA	Sample COA
% Potency = [100 - (Water content by KF)] X HPLC Purity)] / 100	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