H&Z® Ferrous Gluconate Dihydrate, molecular formula C12H22O14Fe·2H2O, relative molecular mass of 482.18.In food can be used as a colorant, nutrient fortifier, can be from reduced iron and gluconic acid.Ferrous gluconate is characterized by high bioavailability, good solubility in water, mild and astringent flavor, and more strengthening in milk drinks, but it is also easy to cause changes in food color and flavor, which limits its application to some extent.