FERROUS SULFATE
Prepared at the 53rd JECFA (1999) and published in FNP 52 Add 7 (1999), superseding specifications prepared at the 51st JECFA (1998), published in FNP 52 Add 6 (1998). PTMDI 0.8 mg/kg bw for iron, established at the 27th JECFA in 1983.
DEFINITION Ferrous sulfate occurs as the heptahydrate
C.A.S. number 7720-78-7
Chemical formula FeSO4·7H2O
Formula weight 278.02
Assay Not less than 99.5% and not more than 104.5%
DESCRIPTION Pale, bluish or whitish green, odourless crystals, crystalline powder or granules.
Effloresces in dry air. In moist air it oxidizes readily to form brownish yellow basic ferric sulfate
FUNCTIONAL USES Nutrient supplement
