| M Formula: | Na8Fe4(P2O7)5•xH2O |
| Properties: | |
| Tan powder. Insoluble in water; soluble in dilute acid. Min 14.5% iron. Iron is in complex form and will not catalyze oxidation reactions. | |
| Derivation: | |
| By reacting tetrasodium pyrophosphate with a soluble iron salt. | |
| Use: | |
| For iron enrichment, particularly in flours and cereals. | |