Section 06 Products of the chemical or allied 29 Organic chemicals 29 01 Acyclic hydrocarbons 29 01 24 - - Buta-1, 3-diene and isoprene 29 01 24 00 - - Buta-1, 3-diene and isoprene Commodity Code Description 29 01 24 00 000 - - Buta-1, 3-diene and isoprene