WickrMe: xiosinmagnet Email: globalinvestors005@gmail.com Pure Original Sildenafil (Viagra) Crystalline Powder available.our products are laboratory tested and can be safely shipped and delivered to any destination with ease. SildenafilCitrate / Viagra / Revatio Cas no: 139755-83-2 Molecular formula: C22H30N6O4S Molecular weight: 474.6 g/mol Appearance: White or Almost White Crystalline Powder Identification: IR,UV Solubility : Soluble in methanol Purity(by HPLC): 99.0%min