Sildenafil citrate is a cyclic guanosine monophosphate (cGMP)-specific VI phosphodiesterase (PDE5) selective inhibitor with good tolerability and high efficacy for ED.
| Product Name | Sildenafil citrate 
 | 
| CAS | 171599-83-0 | 
| Appearance | White to off-white crystalline powder | 
| MF | C28H38N6O11S | 
| Molecular Weight | 666.7 | 
| Purity | 99%  | 
| Storage | Keep in a cool, dry, dark location in a tightly sealed container or cylinder | 
| Shelf Life | 24 Months | 
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