Ferrous sulfate monohydrate is widely used in agriculture as a soil amendment to treat iron deficiency in plants, promoting healthy growth and improving crop yields. It is also a key ingredient in water treatment processes, helping to remove phosphates and control algae in ponds and wastewater systems. In the medical field, it serves as an iron supplement to treat or prevent iron-deficiency anemia in humans and animals. Additionally, it is utilized in the production of inks, dyes, and pigments, contributing to color stability and quality. Its role in cement production as a reducing agent further highlights its industrial importance.