Iron(II) sulfate heptahydrate, 99% (Ferrous sulfate heptahydrate, 99%) is an orally active iron salt. Iron(II) sulfate heptahydrate, 99% replaces iron found in hemoglobin and myoglobin, allowing for the transportation of oxygen via hemoglobin. Iron(II) sulfate heptahydrate, 99% is mainly used for the prevention of iron-deficiency anemia. Iron(II) sulfate heptahydrate, 99% also has anti-tumor effects on chronic myeloid leukemia and breast cancer[1][2][3].