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

Catalogue Number	SIL-004
Lot Number	Sample COA
Batch Quantity	Sample COA
CAS Number	1357931-55-5
Mol. Formula	C17H20N4O5S
Molecular Wt	392.43
Long Term Storage Condition	2-8°C Refrigerator	Handling instruction	Sample COA
IUPAC	4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonic acid (as per EP)
Chemical Name	Sildenafil EP Impurity D
Synonyms	Desmethylpiperazinyl Sildenafil Sulfonic Acid

Test	Results
Appearance	Pale Yellow Solid
Identification by 1H NMR	Sample COA
Identification By IR	Sample COA
Mass (ESI)	Sample COA
Purity	96%+
Wt. Loss by TGA	Sample COA
% Potency	Sample COA
Solubility
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