Sildenafil Citrate USP Pharma Materials Pure Viagra Sex Tablets Active Raw Powder Sildenafil Citrate (wiagra) Basic Info: CAS Number: 171599-83-0 MF: C28H38N6O11S M.W.: 666.7Wygląd: White fine powder What is Sildenafil Citrate (wiagra) ? Sildenafil, commonly known by the trade name Viagra is an oral medication used for the treatment of erectile dysfunction (ED). Pfizer commercially released Viagra in 1996 officially making it …