Iron(II) Sulfate FeSO4 CAS 7720-78-7

Iron(II) Sulfate (Ferrous Sulfate) – Versatile Iron Source for Industry and Medicine

Basic Information

• CAS Number: 7720-78-7 (anhydrous; heptahydrate: 7782-63-0)

• Molecular Formula: FeSO₄ (anhydrous)

• Molecular Weight: 151.91 g/mol (anhydrous)

• Appearance: Greenish or yellowish-white crystals (typically as heptahydrate, FeSO₄·7H₂O)

• Solubility: Soluble in water; slightly soluble in alcohol

Overview
Iron(II) sulfate (ferrous sulfate) is an inorganic compound widely used across multiple industries. It serves as a source of ferrous ions (Fe²⁺) in biological and chemical reactions, and as a precursor for ferric (Fe³⁺) compounds. Its applications range from water treatment and pigment production to medicine and agriculture.

Key Applications

• Water treatment: Used as a coagulant and flocculant in wastewater and drinking water treatment to remove suspended solids and phosphates.

• Pigment production: Precursor for iron oxide pigments (yellow, red, black) used in paints, coatings, and construction materials.

• Medicine: Used as an iron supplement to treat iron‑deficiency anemia; also in topical astringents and hematinics.

• Agriculture: Applied as a soil amendment to correct iron chlorosis in plants and as a moss killer.

• Chemical synthesis: Reagent for the preparation of other iron compounds, including ferric sulfate and ferric chloride.

• Other uses: In reducing agents, mordant in dyeing, and as a component in certain batteries and inks.

Mechanism of Action (Medical)
Ferrous sulfate provides bioavailable iron for hemoglobin synthesis, helping to restore normal red blood cell levels and oxygen transport in anemic patients. It is absorbed in the gastrointestinal tract and incorporated into heme and other iron‑containing proteins.

Safety and Handling

• Moderate toxicity; may cause gastrointestinal upset (nausea, constipation) at high doses.

• Avoid ingestion in large amounts; use appropriate personal protective equipment (gloves, safety goggles) during handling.

• Keep away from strong oxidizers and alkalis (incompatible).

• Store in a cool, dry, well‑ventilated area, away from moisture and direct sunlight.

Packaging
Available in 25 kg bags, 50 kg drums, and custom packaging upon request.

Quality Assurance
Each batch is tested for iron content, heavy metals, and moisture to ensure consistent quality.