Chem. An organic compound, C8H4N4O7, crystallizing in small, 4-sided, oblique rhombic prisms; consisting of two molecules of alloxan minus 1 atom of oxygen, OC.2(NH) = 2(OC).COC.2(OC) = 2(NH).CO.
1853. Thudichum, Urine, 81. On dissolving uric acid in dilute nitric acid, alloxantine is obtained.
1873. Williamson, Chem., § 319. An aqueous solution of alloxan decomposes on boiling into alloxantin.