90731210 - Purchase of CO2 emission credits

CPV code 90731210 in the EU Common Procurement Vocabulary refers to Purchase of CO2 emission credits. It sits at level 6 of the CPV hierarchy as a subcategory within the 90 division. This code is nested directly under 90731200, narrowing the broader category into the specific area of purchase of CO2 emission credits. As a leaf code, 90731210 has no further subdivisions and represents the most precise classification available in this branch — buyers should reference it directly in tender notices when the procurement primarily concerns purchase of CO2 emission credits. Contracting authorities across the EU use 90731210 in TED notices and national procurement portals to signal that a tender relates to purchase of CO2 emission credits.