FeSO44H2O

FeSO44H2O, also known as iron(II) sulfate tetrahydrate, is a chemical compound. It is a hydrated salt of iron and sulfate. The chemical formula indicates that for every molecule of iron(II) sulfate, there are four molecules of water. This compound typically appears as a pale blue or greenish crystalline solid. It is soluble in water, forming a solution that can have a slightly acidic pH.

Iron(II) sulfate tetrahydrate is one of several hydrated forms of iron(II) sulfate. Other common forms include the monohydrate (FeSO4·H2O), heptahydrate (FeSO4·7H2O), and anhydrous (FeSO4). The tetrahydrate form is less common than the heptahydrate.

In terms of its chemical properties, iron(II) sulfate tetrahydrate contains iron in the +2 oxidation state. It can be oxidized to iron(III) compounds. When heated, it loses its water of hydration and can eventually decompose to form iron oxides.

FeSO44H2O has various applications. It is used in water treatment to remove impurities. It can also be found in some fertilizers to provide iron to plants, which is essential for chlorophyll production. Historically, it has been used in the production of inks and dyes.