K3[Fe(CN)6] is a chemical compound known as potassium ferricyanide. It consists of three potassium ions (K+) and one ferricyanide ion ([Fe(CN)6]3-). The ferricyanide ion contains one iron (Fe) atom surrounded by six cyanide (CN) groups, which are negatively charged. This compound is often used in laboratories and various industrial applications, including photography and as a pigment. In its solid form, K3[Fe(CN)6] appears as a bright red or orange crystalline powder. It is soluble in water and can form complex ions with other metals. Due to its unique properties, it is also used in analytical chemistry for detecting certain substances, such as glucose and hydrogen peroxide.