Section 06 Products of the chemical or allied industries 38 Miscellaneous chemical products 38 27 Mixtures containing halogenated derivatives of methane, ethane or prop ane, not elsewhere specified or included 38 27 31 Containing substances of subheadings 2903.41 to 2903.48 Commodity Code Description 38 27 31 00 Containing substances of subheadings 2903.41 to 2903.48 38 27 31 10 R-401A 38 27 31 20 R-401B 38 27 31 30 R-408A 38 27 31 90 R-401B