Vardenafil( tim at bioproco dot com), High quality, safe delivery Product Name: Vardenafil CAS No.: 224785-91-5 Purity: 99.0% Appearance: white crystalline powder M.F.: C23H33ClN6O4S M.W: 525.06 Specifications: Description: White or almost white crystalline powder Melting Point: 191.0°C ~193.0°C Loss of Drying: NMT 1.0% Heavy Metal: NMT 20ppm TLC: Only one spot Assay: NLT 99.5% Conforms with standard USP36