Specification :

Sildenafil Mesylate
White powder
99.9% min ( top grade)
Enterprise standard

Sildenafil Citrate ( Viagra)
Appearance: White crystalline powder
Solubility: Diffluent in Ach, slightly soluble in methanol, almost insoluble in chloroform
Identification HPLC: Comply with standard
IR: IR should comply with the reference standard spectrum
Loss on Drying: 1.0% max
Acidity: 3.0-5.0
Residue on ignition: 0.1% max
Heavy Metals: 20ppm max
Relevant Impurity: 0.5% max
Methanol: 0.3% max
Methylene dichloride; 0.06% max
N, N-Dimethyl formamide: 0.088% max
Enterprise standard
Assay: 99.9% min
Enterprise standard