FeSO42H2O

FeSO4·2H2O refers to iron(II) sulfate dihydrate, a chemical compound. It is a salt that is a hydrated form of iron(II) sulfate. In this compound, each formula unit of iron(II) sulfate is associated with two molecules of water.

Iron(II) sulfate dihydrate is typically a crystalline solid. It can appear in various colors, often ranging from pale green to white, depending on its purity and how it was formed. Like other hydrates, the water molecules are incorporated into the crystal structure.

The compound's properties are similar to other forms of iron(II) sulfate, such as the more commonly known iron(II) sulfate heptahydrate (FeSO4·7H2O). It is soluble in water, forming acidic solutions. When heated, it loses its water of hydration. Further heating can lead to decomposition.

Iron(II) sulfate dihydrate finds applications in various fields. It can be used as a reducing agent in chemical reactions. In some industrial processes, it serves as a precursor for other iron compounds. Its use in agriculture as a soil amendment to provide iron to plants is also a known application, though other hydrates are more common for this purpose. Safety precautions should be taken when handling this substance, as it can be an irritant.