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), 1,3,3,3-tetrafluoropropene (HFO-1234ze) an Commodity Code Description 29 03 51 00 2,3,3,3-Tetrafluoropropene (HFO- 1234yf), 1,3,3,3-tetrafluoropropene (HFO-1234ze) an 29 03 51 10 2,3,3,3-Tetrafluoropropene (HFO-1234yf) 29 03 51 90 Other