It is light yellow green crystal or powder smell-less or with a slight touch of rust smell. It can be easily dissolved in hot water, its molecular formular is C6H10FeO63H2O, and the molecular weight is 228.04. It need to be kept in shadow and air tight container. It has hotable results in the prevention and cure of iron-deficiency anemia. It is widely used in food, beverage, dairy products, table salt, nutritive liquid, medicine, etc