The thiocyanate ion, represented as SCN⁻, is a polyatomic ion composed of one sulfur atom, one carbon atom, and one nitrogen atom. It carries a negative charge, making it an anion. SCN⁻ is commonly found in various chemical compounds and plays a role in biological systems, such as in the metabolism of certain amino acids. SCN⁻ can form complexes with metal ions, influencing their solubility and reactivity. It is also used in analytical chemistry for detecting the presence of certain metals. Additionally, SCN⁻ is involved in the formation of thiocyanate salts, which have applications in various industrial processes.