Tadalafil Chemical Name: Cialis Synonyms: IC 351;CIALIS;ICOS 351;TADALAFIL CAS No: 171596-29-5 CBNumber: CB2236841 Molecular Formula: C22H19N3O4 Molecular Weight: 389.341 Purity: 99% Melting point 298-300C Storage: Hygroscopic, -20C Freezer, Under Inert Atmosphere Quality standard: USP31BP2005 Description: White Crystalline Powder Storage: Shading, Confined Preservation Usage: Used for the treatment of erectile dysfunction. A phosphodiesterase 5 inhibitor It is a kind of PDE-5 inhibitors which can be used for the treatment of male erectile dysfunction. It is also the second generation of phosphodiesterase type 5 inhibitors used to treat male erectile dysfunction