Iron(II) chloride hydrate (FeCl2•xH2O)-Crystalline introduce:
Iron(II) chloride hydrate is the chemical compound of formula FeCl2•xH2O. It is a paramagnetic solid with a high melting point.
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
Magnetic susceptibility (χ)：+14750·10−6 cm3/mol
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.
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