Ferricyanide is a chemical compound that contains iron in its +3 oxidation state and cyanide ions. Its chemical formula is K3[Fe(CN)6], indicating that it is often found as a potassium salt. Ferricyanide is commonly used in various applications, including photography, electrochemistry, and as a colorant in some industrial processes. In solution, ferricyanide appears as a deep red color, which is a characteristic feature of the compound. It can react with other substances, such as ferrocyanide, to form different complexes. Ferricyanide is also important in laboratory settings for its role in redox reactions and as a reagent in analytical chemistry.