Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 03 Halogenated derivatives of hydrocarbons. 29 03 71 Chlorofluoromethane (HCFC-22) 29 03 71 00 Chlorofluoromethane (HCFC-22) Commodity Code Description 29 03 71 00 000 Chlorofluoromethane (HCFC-22)