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

Catalogue Number	SIL-004
Item/Batch Number	Sample COA
Quantity	Sample COA
CAS Number	1357931-55-5
Mol. Formula	C17H20N4O5S
Molecular Wt	392.43
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)
Synonyms	Desmethylpiperazinyl Sildenafil Sulfonic Acid
Long Term Storage Condition	2-8°C Refrigerator
Handling instruction	Sample COA

Test	Results
Appearance	Pale Yellow 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
Purity	96%+
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