CPV code 14311300 designates Crude natural potassium salts in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
14311300 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 14311000 (Natural calcium, aluminium calcium phosphate and crude natural potassium salts).