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Ferrous sulfate CAS#7720-78-7

  • Ferrous sulfate CAS#7720-78-7
  • Ferrous sulfate CAS#7720-78-7
  • Ferrous sulfate CAS#7720-78-7
  • Ferrous sulfate CAS#7720-78-7
  • Ferrous sulfate CAS#7720-78-7

Ferrous sulfate CAS#7720-78-7

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.


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product description

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.

Product Information

Parameters


Melting pointdecomposes at 671℃ [JAN85]
density3.65
vapor pressure0Pa at 20℃
storage temp.Store at +15°C to +25°C.
solubilityWater (Slightly)
formwhite orthorhombic crystals
colorwhite orthorhombic crystals, crystalline; hygroscopic
Odorat 100.00?%. odorless
PH2.5 (20°C, 50g/L in H2O)
Water Solubilityg/100g solution H2O: 13.6 (0°C), 22.8 (25°C), 24.0 (100°C); solid phase, FeSO4 · 7H2O (0°C, 25°C), FeSO4 ·H2O (100°C) [KRU93]
Dielectric constant14.2（14℃）
Cosmetics Ingredients FunctionsASTRINGENT
InChIInChI=1S/Fe.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
InChIKeyBAUYGSIQEAFULO-UHFFFAOYSA-L
SMILES[Fe+2].S([O-])([O-])(=O)=O
CAS DataBase Reference7720-78-7(CAS DataBase Reference)
NIST Chemistry ReferenceFerrous sulfate(7720-78-7)
EPA Substance Registry SystemFerrous sulfate (7720-78-7)


Safety Information


Risk Statements25
Safety Statements45
HS Code28332910
Hazardous Substances Data7720-78-7(Hazardous Substances Data)
ToxicityLD50 oral in rat: 319mg/kg


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