Iron(II) sulfate, also known as ferrous sulfate, is a chemical compound with the formula FeSO4. It consists of iron in the +2 oxidation state and a sulfate ion. This compound is commonly found in nature as the mineral melanterite and is often used in various industrial applications, including water treatment and as a fertilizer. In addition to its industrial uses, iron(II) sulfate is also important in laboratories and is used in the production of other iron compounds. It can be found in different forms, such as crystals or powder, and is typically greenish or blue in color. Safety precautions should be taken when handling it, as it can be harmful if ingested or inhaled.