The use and function of ferrous sulfate
1. Water treatment
Ferrous sulfate is used as a flocculant, fungicide, and water purifier in the treatment of industrial wastewater from printing and dyeing factories, paper mills, electroplating factories, circuit board factories, food factories, pharmaceutical factories, fertilizer factories, pesticide factories, and other industries. It also removes phosphates from urban and industrial wastewater to prevent eutrophication of water bodies.

2. Reducing agent
Ferrous sulfate is used as a reducing agent to reduce chromate in cement.
3. Medicinal use
Ferrous sulfate is used to treat iron deficiency anemia; Also used to add iron to food, long-term excessive use may cause side effects such as abdominal pain and nausea; Medically, it can also be used as a local astringent and blood supplement for chronic bleeding caused by uterine fibroids.
4. Coloring agent
          a、 The production of tannic acid iron ink and other inks requires the use of ferrous sulfate, which is also present in wood dyeing mordants.
          b、 Ferrous sulfate can be used to dye concrete with a yellow rust color.
          c、 Woodworkers use ferrous sulfate to dye maple wood with a silver color.
5. Agriculture
Agricultural ferrous sulfate can regulate soil pH, promote chlorophyll formation (also known as iron fertilizer), and prevent yellowing disease caused by iron deficiency in flowers and trees. It is an essential element for acid loving flowers and trees, especially iron trees; It can also be used as a pesticide to prevent and control wheat smut, apple and pear scab, and fruit tree rot; It can also be used as fertilizer and to remove moss and lichen from tree trunks.

6. Industrial

Industrial grade ferrous sulfate is used to manufacture iron salts, inks, iron oxide red, indigo, carbon monoxide shift catalysts, battery catalysts, polymerization catalysts, etc.
7. Analytical Chemistry
Ferrous sulfate can be used as a chromatographic analysis reagent, for drop analysis and determination of platinum, selenium, etc.