PRODUCT NAME: Omeprazole Related Compound B
Date of Mfg: Sample COA	RETEST DATE: Sample COA

Catalogue Number	OMP-003
Lot Number	Sample COA
Batch Quantity	Sample COA
CAS Number	37052-78-1
Mol. Formula	C₈H₈N₂OS
Molecular Wt	180.23
Long Term Storage Condition	Refrigerator, Under Inert Atmosphere	Handling instruction	Sample COA
Chemical Name	Omeprazole Related Compound B
Synonyms	1,3-Dihydro-5-methoxy-2H-benzimidazole-2-thione; 2-Mercapto-5-methoxy-1H-benzimidazole; 2-Mercapto-5-methoxybenzimidazole; 5-Methoxy-1H-benzimidazole-2-thiol; 5-Methoxy-2-benzimidazolethiol; Esomeprazol EP Impurity A

Test	Results
Appearance	Off-White to Pale Beige Solid
Identification by 1H NMR	Sample COA
Identification By IR	Sample COA
Mass (ESI)	Sample COA
Purity	NLT 98%
Wt. Loss by TGA	Sample COA
% Potency	Sample COA
Solubility	DMSO, Methanol (Sparingly)
QC Release Date	Sample COA
Attachments	Sample COA
Note: This material can be used as a referance standard and is for research purpose ONLY and not for human consumption