Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 18 Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. 29 18 14 Citric acid 29 18 14 00 Citric acid Commodity Code Description 29 18 14 00 000 Citric acid