Section 05 MINERAL PRODUCTS 27 Mineral fuels, mineral oils and products of their distillation; bitumi nous subs 27 11 Petroleum gases and other gaseous hydrocarbons. 27 11 11 Natural gas 27 11 11 00 Natural gas Commodity Code Description 27 11 11 00 00 Natural gas 27 11 12 00 00 Propane 27 11 13 00 00 Butanes 27 11 14 00 00 Ethylene, propylene, butylene et butadiene 27 11 19 00 00 Other 27 11 21 00 00 Natural gas 27 11 29 00 00 Other