Iron(III) ions, represented as Fe^{3+}, are positively charged particles formed when iron loses three electrons. This oxidation state is common in various chemical compounds, including iron(III) oxide and iron(III) chloride. Iron(III) ions play a crucial role in biological systems, particularly in the transport of oxygen in hemoglobin. In aqueous solutions, iron(III) ions can react with water to form hydrolyzed species, which can affect the pH of the solution. They are also important in industrial applications, such as in the production of pigments and catalysts. Understanding iron(III) ions is essential in fields like chemistry and environmental science.