Iron(III) phosphate, with the chemical formula FePO4, is an inorganic compound that plays a significant role in various fields, including agriculture, materials science, and environmental applications. This salt of iron is characterized by its distinct reddish-brown color and is typically found in several hydrated forms, such as ferric phosphate (FePO4·nH2O). Iron(III) phosphate is commonly used as a fertilizer due to its high phosphorus content, essential for plant growth. Additionally, it serves as a corrosion inhibitor, pigment in coatings, and a catalyst in organic reactions, making it a versatile compound with multiple applications across industries.