Section 06 Products of the chemical or allied 29 Organic chemicals 29 03 Halogenated derivatives of hydrocarbons 29 03 74 - - Chlorodifluoroethanes (HCFC-142, 142b) 29 03 74 00 - - Chlorodifluoroethanes (HCFC-142, 142b) Commodity Code Description 29 03 74 00 000 - - Chlorodifluoroethanes (HCFC-142, 142b)