CPV code 24313110 designates Miscellaneous sulphides in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
24313110 sits under 24313100 (Sulphides, sulphites and sulphates) and groups 2 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.