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, butylenes and butadiene Commodity Code Description 27 11 14 00 - - Ethylene, propylene, butylenes and butadiene