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Iron(II) chloride hydrate (FeCl2•xH2O)-Crystalline

  • 23838-02-0
  • FeCl2•xH2O
  • 1726010800CR
  • 99%
  • 231-843-4
  • Class 8
  • UN3260
  • PG III



 Iron(II) chloride hydrate is the chemical compound of formula FeCl2•xH2O. It is a paramagnetic solid with a high melting point.

Chemical formula:FeCl2•xH2O

Molar mass:198.8102 g/mol (tetrahydrate)

Appearance:Pale green solid (di-tetrahydrate)

Density:2.39 g/cm3 (dihydrate);1.93 g/cm3 (tetrahydrate)

Melting point:120 °C (dihydrate);105 °C (tetrahydrate)

Solubility in water:64.4 g/100 mL (10 °C);68.5 g/100 mL (20 °C);105.7 g/100 mL (100 °C)

Solubility in THF:Soluble

log P:−0.15

Magnetic susceptibility (χ):+14750·10−6 cm3/mol

Crystal structure:Monoclinic




It is used as a reducing agent in metallurgy, in pharmaceutical preparations, as a mordant in dyeing and in sewage treatment. Ferrous chloride has a kind of niche application. During the laboratory synthesis of iron complexes, ferrous chloride acts as a reducing flocculating agent in wastewater treatment, particularly for wastes containing chromate. It is the precursor to hydrated iron(III) oxides that are magnetic pigments. Ferrous chloride is employed as a reducing agent in many organic synthesis reactions.