Ferrous sulfate is an iron supplement commonly used to treat or prevent iron deficiency anemia. It is a chemical compound that contains iron in its +2 oxidation state, making it an effective source of iron for the body. This compound is often found in the form of blue-green crystals or as a powder and is soluble in water. In addition to its use in medicine, ferrous sulfate has applications in various industries. It is used in water treatment processes to remove impurities, as well as in the production of pigments and fertilizers. Its versatility makes it an important compound in both health and industrial sectors.