CPV code 14311000 designates Natural calcium, aluminium calcium phosphate and crude natural potassium salts in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
14311000 sits under 14310000 (Fertiliser minerals) and groups 3 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.