Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 03 Halogenated derivatives of hydrocarbons. 29 03 72 Dichlorodifluoromethane (HCFC-123) 29 03 72 00 Dichlorodifluoromethane (HCFC-123) Commodity Code Description 29 03 72 00 000 Dichlorodifluoromethane (HCFC-123)