Product Name: Sildenafil Citrate Molecular Formula: C22H3N6O4S-C6H8O7 CAS NO.: 171599-83-0(139755-83-2) Appearance : white or almost white crystalline powder; odorless; tasteless. Slightly soluble in water, methanol; very slightly soluble in ethanol, chloroform Specification: Assay: 99.92%; MP: 186 -187; Heavy Metals: