Ethylene, propylene, butylene, butadiene and other petroleum gases or gaseous hydrocarbons, except natural gas

CPC v2.1 class (Ethylene, propylene, butylene, butadiene and other petroleum gases or gaseous hydrocarbons, except natural gas) within 'Petroleum gases and other gaseous hydrocarbons, except natural gas'. UN Central Product Classification grouping of related products at this level.