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Ferrous sulfate CAS#7720-78-7
Basic Information
green vitriol
iron(II) sulfate
FeSO₄·7H₂O
green crystals (heptahydrate)
Ferrous sulfate is a water-soluble iron salt encountered in several hydration states. The heptahydrate, traditionally called green vitriol, forms green crystals and changes hydration state on heating. Applications include iron-source ingredients for food fortification and supplement formulations, as well as manufacture of iron compounds and sulfur-containing industrial chemicals. Hydrated and dried forms should be distinguished when selecting material for a formulation.
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Green vitriol (iron(II) sulfate, FeSO₄·7H₂O) has been known since the 13th century and is traditionally obtained by crystallization from iron or iron-based materials reacted with dilute sulfuric acid.
High Solubility & Multiple Hydration Forms：The heptahydrate forms green monoclinic crystals with high water solubility (296 g/L at 25 °C) and can be converted into mono-, tetra-, or anhydrous forms through controlled dehydration processes.
Thermal Transformation Capability：Upon heating, iron(II) sulfate undergoes systematic dehydration and eventually decomposes at high temperatures to form iron(III) oxide (Fe₂O₃), releasing sulfur dioxide and sulfur trioxide.
Industrial Relevance of Iron(III) Oxide：The resulting iron(III) oxide, also known as hematite, is a stable, high-temperature-resistant material widely used in industry. It dissolves in dilute acids to form iron(III) salts and can be reduced to metallic iron under controlled conditions.
Products Description of Ferrous sulfate CAS#7720-78-7
Ferrous sulfate (green vitriol, FeSO₄·7H₂O) is a water-soluble iron compound produced from iron and dilute sulfuric acid. It has heptahydrate, tetrahydrate and monohydrate forms, and decomposes to industrial-grade hematite (iron(III) oxide) and sulfur oxides when strongly heated.
Product Applications of Ferrous sulfate CAS#7720-78-7
Ferrous sulfate is a high-bioavailability iron source (20% elemental iron as heptahydrate, 32% as dried form) used in nutritional supplements and food fortification (baking mixes, infant foods, cereals, pasta). Encapsulated grades have better stability. It is also a key raw material for sulfur dioxide, sulfuric acid and iron-based compound production.
Parameters
Safety Information
Delivery Time
Inventory 2-3 working days New manufacturing 7-10 working days
Mode of Transportation
1. By Air, fast but expensive.
2. By Sea, usual and economy.
3. By Train, suit for middle Asia countries.
4. By Express, suit for small package.
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1. What products does Shandong Junzheng Chemical supply?
We supply inorganic chemicals, organic solvents, water treatment chemicals, and surfactants, including calcium chloride, soda ash, sodium bicarbonate, caustic soda, citric acid, ethyl acetate, and SLES. Please contact us to confirm specific product availability.
2. Which industries do your products serve?
Our products serve pharmaceutical, agrochemical, dye, rubber, construction, coal processing, and other chemical industries. Product suitability depends on the required grade, specifications, and application.
3. How can I get a quotation?
Please provide the product name, CAS number, required specifications, quantity, packaging requirements, and destination port. These details help us prepare an accurate quotation.
4. How do you control product quality?
We follow strict quality testing procedures supported by technical personnel, research equipment, and an established management system. Specific quality requirements can be confirmed before placing an order.
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Yes. Our technical team can assist with product selection based on your application and required specifications. Please share your intended use and key technical requirements.
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