June 19, 2024
Ferrous Sulfate

Ferrous Sulfate – A Versatile Compound With Wide Applications

Ferrous sulfate (FeSO4) is a compound consisting of iron, sulfur and oxygen. It is an inorganic compound that is widely used in various industries and applications.

Chemical Properties

Ferrous sulfate is a type of iron(II) sulfate. It is a white-colored salt that is highly soluble in water. When ferrous sulfate dissolves in water, it forms Fe2+ (ferrous) ions and SO42- (sulfate) ions. Ferrous sulfate has the molecular formula FeSO4.7H2O which means it contains seven water molecules for every molecule of ferrous sulfate.

Some key chemical properties of ferrous sulfate include:

– It is hygroscopic in nature which means it readily absorbs moisture from the air.

– It releases heat when dissolved in water forming an exothermic reaction.

– Ferrous sulfate decomposes above 130°C forming iron(III) oxide and sulfur dioxide.

– In the presence of oxidizing agents like oxygen, ferrous sulfate oxidizes to form ferric sulfate (Fe2(SO4)3).

– Strong acids, alkalis or heat can decompose ferrous sulfate releasing sulfur dioxide gas.

Uses of Ferrous Sulfate

Nutritional Supplement

Ferrous Sulfate is widely used as an iron supplement to treat and prevent iron-deficiency anemia. It is a common over-the-counter medication and dietary supplement for iron intake. Ferrous sulfate contains 60% elemental iron content making it a very effective iron supplement.

Water Treatment

In water treatment plants, ferrous sulfate is used as a coagulant to clump together particles in water prior to filtration. It helps in clarifying muddy and turbid waters. The ferrous ions act as a bridge bonding particles and aiding their removal.


Being a rich iron source, ferrous sulfate is used as a fertilizer for iron deficient soils and crops. It provides iron to plants for critical roles in photosynthesis, metabolism and enzymatic processes. Ferrous sulfate sprays are also used to treat iron-deficiency chlorosis in plants.

Manufacturing Industries

Some key industrial uses of ferrous sulfate include:

– In steel manufacturing, ferrous sulfate is used in pickling baths to remove rust, scales and oxides from steel surfaces.

– It acts as a dyeing mordant or fixing agent in textile industries to set dyes on fabrics.

– Ferrous sulfate is used as a reducing agent in copper electroplating to deposit copper coatings on metal substrates.

– Other metallurgical uses include production of ferroalloys, welding fluxes, galvanizing fluxes, etc.

– Ferrous sulfate is also used in manufacture of ink, paints, photography, leather tanning, wood preservatives and more.

Safety and Regulations

Being an iron supplement, ferrous sulfate is generally well tolerated by most people at recommended doses. However, excess intake can cause side effects like nausea, vomiting, constipation and black stools. Pregnant women should consult a doctor before use. Proper safety precautions should be followed during industrial use due to risks of fire and toxicity. Ferrous sulfate products are regulated and approved for different uses by regulatory bodies in many countries.

Ferrous sulfate is an important inorganic compound with versatile applications across many industries and fields. Due to its favorable properties, ferrous sulfate serves as an economical and effective source of iron, coagulant, fertilizer, reducing agent and more. With growing industrialization and population, demand for ferrous sulfate is expected to rise further in the coming years. Proper handling and regulations are essential given the risks involved with excess intake or accidents.

1. Source: Coherent Market Insights, Public sources, Desk research
2. We have leveraged AI tools to mine information and compile it