CPV code 24327330 designates Pitch tar in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
24327330 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 24327300 (Oils and products of the distillation of high-temperature coal tar, pitch and pitch tar).