Section 05 Mineral products 27 Mineral fuels, mineral oils and products of their distillation; bituminous substances; mineral waxes 27 11 Petroleum gases and other gaseous hydrocarbons 27 11 14 Ethylene, propylene, butylene and butadiene 27 11 14 00 Ethylene, propylene, butylene and butadiene Commodity Code Description 27 11 14 00 000 Ethylene, propylene, butylene and butadiene