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

Catalogue Number	SIL-001
Item/Batch Number	Sample COA
Quantity	Sample COA
CAS Number	1094598-75-0
Mol. Formula	C₂₂H₃₀N₆O₅S
Molecular Wt	490.58
IUPAC	5-[2-ethoxy-5-(4-methyl-4-oxidopiperazin-4-ium-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,3-d]pyrimidin-7-one
Synonyms	5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one; Sildenafil EP Impurity B; Sildenafil N-Oxide
Long Term Storage Condition	Hygroscopic, Refrigerator, under inert atmosphere
Handling instruction	Sample COA

Test	Results
Appearance	White to Off-White 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 (Sparingly), DMSO (Sparingly), Methanol (Slightly)
Purity	NLT 98%
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