Each mL contains 20 mg elemental iron (100 mg/5 mL) as iron sucrose in water or injection. It is available in 5 mL ampule. Iron sucrose injection is a dark brown colloidal solution for IV use. It has a molecular weight of approximately 34,000-60,000 Daltons and a proposed structural formula: Na2Fe5O8·3(H2O)n·m(C12H22O11). Where: n is the degree of iron polymerization and m is the number of sucrose molecules associated with the iron (III)-hydroxide.