Hesperidin CasNo.:24292-52-2 is a plant chemical that is classified as a "bioflavonoid." It is found primarily in citrus fruits. People use it as medicine. Hesperidin alone, or in combination with other citrus bioflavonoids (diosmin, for example), is most commonly used for blood vessel conditions such as hemorrhoids, varicose veins, and poor circulation (venous stasis).