Ferrous Sulfate Heptahydrate

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    Ferrous Sulfate Heptahydrate

    Ferrous Sulfate Heptahydrate

    Ferrous Sulfate Heptahydrate: Essential Iron Source for Industrial and Agricultural Use

    Introduction

    Ferrous Sulfate Heptahydrate, chemically known as FeSO₄·7H₂O, is a blue-green crystalline compound widely recognized for its iron-rich content and versatile applications. As a vital source of ferrous iron (Fe²⁺), this compound plays a critical role in agriculture, water treatment, industrial manufacturing, and even nutritional supplementation. Its combination of affordability, solubility, and bioavailability has made it a preferred iron compound across multiple sectors.

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    Description

    Chemical Identity and Description

    • Chemical Name: Ferrous Sulfate Heptahydrate

    • Formula: FeSO₄·7H₂O

    • CAS Number: 7782-63-0

    • Molecular Weight: 278.01 g/mol

    • Appearance: Pale blue-green crystals

    • Solubility: Highly soluble in water

    • Odor: Odorless

    • Taste: Astringent, metallic (not for direct consumption without processing)

    Ferrous Sulfate Heptahydrate contains seven molecules of water of hydration, which give the crystals their characteristic color and structure. It is commonly produced as a byproduct of steel pickling using sulfuric acid.

    Technical Specifications

     

    Property Specification
    Iron (Fe) Content 19.5% – 20.5%
    Purity ≥ 98%
    Moisture Content 45% – 50% (due to hydration)
    pH (5% solution) 3.0 – 4.0
    Appearance Blue-green crystalline powder or granules
    Solubility in Water Fully soluble
    Packaging 25 kg bags, 50 kg drums, or bulk sacks
    Shelf Life 12 – 24 months in dry, sealed conditions

    Applications

    🌾 Agriculture

    • Used as a micronutrient fertilizer to correct iron deficiencies in soil and plants, especially in crops like rice, citrus, maize, and vegetables.

    • Helps prevent chlorosis (yellowing of leaves) caused by iron deficiency.

    💧 Water Treatment

    • Acts as a coagulant and flocculant aid in municipal and industrial wastewater treatment.

    • Helps remove phosphorus and suspended solids.

    🏭 Industrial Applications

    • Used in pigment manufacturing, especially for iron oxide pigments.

    • Functions as a reducing agent in chemical synthesis.

    • Employed in the cement industry to control chromate levels.

    🍽️ Nutritional Use

    • In some regulated pharmaceutical and food applications, it is used as an iron supplement in animal feed and, in certain countries, for human dietary purposes (under strict regulation and purity grades).

    Benefits and Features

    • ✅ High Iron Content: Delivers an efficient source of bioavailable iron.

    • ✅ Cost-Effective: Economical option for industrial and agricultural sectors.

    • ✅ Multi-Industry Use: Versatile applications in water treatment, agriculture, and manufacturing.

    • ✅ Eco-Friendly: Often derived as a byproduct, minimizing industrial waste.

    • ✅ Easy Storage & Handling: Available in multiple packaging options for bulk or small-scale use.

    Storage and Safety

    • Store in cool, dry places, away from moisture to avoid caking or decomposition.

    • Use gloves and eye protection when handling.

    • Follow local environmental guidelines for disposal.

    • Avoid inhalation or ingestion without appropriate handling protocols.

    Conclusion

    Ferrous Sulfate Heptahydrate is a reliable, multifunctional iron compound widely used for its effectiveness, versatility, and economic value. From enriching soil and supporting crop yield to purifying water and serving as a chemical precursor, this compound remains indispensable in industrial, environmental, and agricultural processes. For businesses looking to enhance performance while reducing costs, FeSO₄·7H₂O is a smart, sustainable solution.

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