CPV code 24315240 designates Cyanates in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
24315240 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 24315200 (Cyanide, cyanide oxide, fulminates, cyanates, silicates, borates, perborates, salts of inorganic acids).