Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 17 Polycarboxylic acids, their anhydrides...; their ... derivatives 29 17 36 Terephthalic acid and its salts 29 17 36 00 Terephthalic acid and its salts Commodity Code Description 29 17 36 00 000 Terephthalic acid and its salts