CPV code 24313000 designates Sulphides, sulphates; nitrates, phosphates and carbonates in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
24313000 sits under 24310000 (Basic inorganic chemicals) and groups 4 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.