Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 03 Halogenated derivatives of hydrocarbons. 29 03 51 2,3,3,3-Tetrafluoropropene (HFO-1234yf) 29 03 51 10 2,3,3,3-Tetrafluoropropene (HFO-1234yf) Commodity Code Description 29 03 51 10 000