Fe³⁺, or ferric ion, is a positively charged ion of iron with a charge of +3. It is formed when iron loses three electrons. This ion is commonly found in various compounds, such as iron(III) oxide and iron(III) chloride, and plays a crucial role in biological systems, including hemoglobin in blood. In nature, Fe³⁺ is important for many processes, including photosynthesis and cellular respiration. It is also used in various industrial applications, such as in the production of pigments and catalysts. Its ability to form complexes with other molecules makes it significant in both chemistry and biology.