Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 03 Halogenated derivatives of hydrocarbons. 29 03 73 Dichlorofluoroethanes (HCFC-141, 141b) 29 03 73 00 Dichlorofluoroethanes (HCFC-141, 141b) Commodity Code Description 29 03 73 00 000 Dichlorofluoroethanes (HCFC-141, 141b)