Certificate of Analysis

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Sildenafil

Molecular Formula:	C₂₂H₃₀N₆O₄S
Molecular Weight:	474.58
CAS No.:	139755-83-2
Storage (From the date of receipt):	3 years -20°C powder
Storage (From the date of receipt):	1 year -80°C in solvent
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HPLC: 99.96% purity | NMR: The chemical structure of Sildenafil is not suitable for 1HNMR detection.