Chemical Formula: FeSO₄·H₂O
Physical Appearance: Pale green to grayish crystalline powder; odorless; soluble in water and slightly soluble in alcohol. Less hygroscopic and more stable than the heptahydrate form.
Applications: Used as a source of iron in fertilizers and animal feed, in water and wastewater treatment as a reducing and coagulating agent, and in cement, pigments, and textile dyeing.