Chemical & Dyes Ferrous Sulfate Heptahydrate Home / Product / Ferrous Sulfate Heptahydrate Overview Category Chemical & Dyes Sub-Category Ferrous Sulfate Heptahydrate Name Ferrous Sulfate Heptahydrate Details Ferrous Sulfate Heptahydrate 19.7% Fe ******* Molecular Formula: FeSO4·7H2O ********** Ferrous heptahydrate has superior features of high water solubility, high Fe % and less caking risks. It is especially good for fertilizer as Fe supplement and treatment of waste water as coagulants.