Ferrous Sulfate Heptahydrate 98% Min

Ferrous Sulphate Heptahydrate 98% Min is a water-soluble iron(II) salt supplied as FeSO₄·7H₂O. It is used as an iron source and process chemical across applications including water and wastewater treatment, agricultural micronutrient formulations, fertilizer production and selected industrial chemical processes.

Its ferrous iron chemistry makes it useful where reducing conditions, iron supplementation, precipitation chemistry or conversion to other iron compounds are required. The actual suitability of the material depends on the required grade, impurity limits, application chemistry, dosing conditions and regulatory requirements.

KIKI'S Industrial Chemicals supplies this material for commercial and industrial procurement in Kenya and supports regional sourcing for East African customers subject to quantity, documentation, logistics and destination requirements.

At 98% minimum assay, Ferrous Sulphate Heptahydrate consists of iron(II) coordinated by seven water molecules of crystallization. The formula weight of 278.01 g/mol yields an elemental iron concentration of approximately 19.7% Fe (Fe = 55.845 g/mol). In aquatic systems, Fe²⁺ acts as an electron donor in reduction chemistry (such as the reduction of toxic hexavalent chromium Cr(VI) to trivalent chromium Cr(III)) and precipitates dissolved orthophosphate as insoluble vivianite-type ferrous phosphate matrices: 3Fe²⁺ + 2PO₄³⁻ → Fe₃(PO₄)₂↓.

Upon aeration or alkaline dosing (pH 7.5 – 9.0), Fe²⁺ oxidizes rapidly to ferric iron (Fe³⁺), precipitating dense ferric hydroxide (Fe(OH)₃) flocs that sweep colloidal solids, heavy metal ions, and organic dyes from suspension. In agriculture and horticulture, it supplies bioavailable bivalent iron to overcome lime-induced iron chlorosis in neutral to alkaline soils without creating sodium or chloride toxicity.