Rutin, a natural citrus bioflavonoid, is extracted from the dry buds of sophora japonical. Rutin is a tasteless, yellow or greenish-yellow crystalline powder that becomes plastic when heated between 185°C and 192°C and discomposed at 215°C. Rutin is practically insoluble in water while soluble in methanol and ethanol. It is a naturally occurring pigment. Rutin is classified as vitamin p which increases the strength of the walls of the blood capillaries and regulates theirpermeability.Others classified as vitamin p are catechin, citrin, eriodictin, hesperetin, hesperidin, nobiletin, quercetin,sinensetin, and tangeretin.