About
The character 氰 is a modern scientific creation for cyanogen and related cyanide compounds in Chinese chemical nomenclature. It is a phono-semantic compound using the semantic radical 气, indicating a gaseous state at room temperature, with the phonetic component 青 (qīng) providing the pronunciation. The element 青, meaning blue or green, was chosen to approximate the sound of "cyan", a prefix from the Greek word for dark blue, linking the character to the international etymology of the chemical. Since its invention, it has served solely as a technical term in chemistry, with no classical or non-scientific uses.