Sildenafil Citrate, Dosage : As prescribed by doctor

We are offering sildenafil citrate\rformula: c28h38n6o11s\rcas no.: 171599-83-0\rsynonyms: piperazine,1-[[3-(4,7-dihydro-1-methyl-7-oxo-3-propyl-1h-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methyl-(9ci);\rmolecular weight: 666.70\rmelting point: 187-189 °c\rboiling point: 672.4 °c at 760 mmhg\rflash point: 360.5 °c\rsolubility: insoluble in water, ethanol\rrisk codes: 36/37/38\rassay: 99%\rappearance: white crystalline powder\rstorage: cool and seal\rapplication: an orally active selective type 5 cgmp phosphodiesterase inhibitor. Pharmaceutical material.