Ferrocyanide ions are complex anions with the formula Fe(CN)₆^4-. They consist of a central iron atom surrounded by six cyanide ions (CN⁻). This ion is commonly found in various chemical compounds, including potassium ferrocyanide, which is used in food processing and as a pigment in paints. Ferrocyanide is notable for its stability and low toxicity compared to other cyanide compounds. It can form various coordination complexes and is often used in analytical chemistry to detect the presence of certain metals. Its unique properties make it valuable in both industrial and laboratory settings.