Ferrous sulfate monohydrate, also known as feed grade ferrous sulfate, is a dry white or light white powder solid formed by wet dissolving, impurity removing, dehydration and recrystallization. Ferrous sulfate heptahydrate is a by-product of titanium dioxide plant, which is light green or green granular solid. The crystal particles of ferrous sulfate heptahydrate are larger than that of ferrous sulfate monohydrate. Ferrous sulfate monohydrate is feed grade, so it is often used as a feed additive. It has a good role in supplying nutritional iron to the livestock, and can prevent the occurrence of anemia diseases in animals.

Agricultural grade ferrous sulfate is gray white powder with good fluidity and dispersibility. Agricultural grade ferrous sulfate implements the national standard gb8252-87. It is gray white powder with good fluidity and dispersibility. Also known as alum, it is often used as chemical fertilizer, pesticide and herbicide, mainly for the treatment of wheat smut. Agricultural grade ferrous sulfate is used to adjust the pH of soil, which can make the alkaline soil not too big, and can supplement iron to plants. Ferrous sulfate is used in gardening to kill mosses.

Ferrous sulfate heptahydrate is also known as industrial grade ferrous sulfate. Ferrous sulfate heptahydrate can be used as reducing agent in wastewater treatment for decolorization and flocculation. Suitable dosage can adjust pH value of alkaline water, organically combine with suspended solids in water, and accelerate precipitation. It is mainly used in water purification and industrial wastewater treatment, and has bactericidal effect. It can also be used in cement to remove toxic chromate in cement, and used as blood tonic agent in medicine. Because of its low cost, it is more widely used.