Iron(II) chloride is a paramagnetic solid with a high melting point. The compound is white, but typical samples are often off-white. FeCl2 crystallizes from water as the greenish tetrahydrate, which is the form that is most commonly encountered in commerce and the laboratory. There is also a dihydrate. The compound is also soluble in water; aqueous solutions of FeCl2 are highly transparent and pale green in color.Iron dichloride tetrahydrate is a hydrate that is the tetrahydrate form of iron dichloride. It is a hydrate, an iron coordination entity and an inorganic chloride. It contains an iron dichloride.
- Formula
- Cl2FeH8O4
- Molar mass
- 198.805 g/mol
- CAS Number
- 13478-10-9
- Density
- 1.93 g/cm3
- Purity/Grade
- 98% (ReagentPlus)
- Appearance
- Crystal
- Vapour pressure
- 13.3 hPa (10.0 mmHg) at 693°C (1,279°F)
- Melting point/freezing point
- 105 - 110°C (221 - 230°F)
- pH
- 2.5 at 100 g/l at 20°C (68°F)