Kaempferol (/'ki?mpf?r?l/) is a natural flavonol, a type of flavonoid, that has been isolated from tea, broccoli, Delphinium, Witch-hazel, grapefruit, cabbage, kale, beans, endive, leek, tomato, strawberries, grapes, brussels sprouts, apples and other plant sources. Kaempferol is a yellow crystalline solid with a melting point of 276-278 °C. It is slightly soluble in water but soluble in hot ethanol and diethyl ether.
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