Table 6.
Common iron salts used for food and water fortification and their corresponding mass to obtain 1 kg of elemental iron.
| Iron source | Formula | M (g/mol) | x (−) | msource (kg) | Price (Eur/kg) |
|---|---|---|---|---|---|
| Elemental iron | Fe | 56.0 | 1.00 | 1.00 | 3.00 |
| Fe(II) fumarate | C4H2FeO4 | 170.0 | 0.33 | 3.03 | 95.80 |
| Fe(II) sulfate | FeSO4.7H2O | 278.0 | 0.20 | 4.96 | 163.40 |
| NaFeEDTA | C10H12FeN2NaO8 | 367.0 | 0.15 | 6.55 | 299.00 |
| Fe(II) gluconate | C12H24FeO14 | 448.0 | 0.12 | 8.00 | 102.00 |
‘x (−)’ is the mass ratio of Fe in the salt. The given kg prices of the salts (chemicals) are from Fisher Scientific (https://www.fishersci.com/—Accesses 26/09/2022). The given Fe0 price corresponds to commercial iron nails78.