CAS NO.: 139755-83-2 Molecular Formula: C22H3N6O4S-C6H8O7 Molecular Weight: 666.7¡¡ Appearance: white to almost white crystalline powder, odorless, tasteless, can not soluble in water, ethanol Specification: Assay: ¡Ý99.6£¥; MP: 186¡«187¡æ; Heavy Metals: ¡Ü20ppm; Loss on drying: ¡Ü2.5£¥; Residue on Ignition: ¡Ü0.05£¥ Use: it is pharmaceutical raw material, indicated for the treatment of erectile dysfunction. Standard: enterprise standard.