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

Catalogue Number	SIL-001
Lot Number	Sample COA
Batch Quantity	Sample COA
CAS Number	1094598-75-0
Mol. Formula	C₂₂H₃₀N₆O₅S
Molecular Wt	490.58
Long Term Storage Condition	Hygroscopic, Refrigerator, under inert atmosphere	Handling instruction	Sample COA
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
Chemical Name	Sildenafil EP Impurity B
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

Test	Results
Appearance	White to Off-White 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	Chloroform (Sparingly), DMSO (Sparingly), Methanol (Slightly)
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