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 30 Carboxylic acids with aldehyde, ketone but without oxygen function, etc Commodity Code Description 29 18 30 00 Carboxylic acids with aldehyde, ketone but without oxygen function, etc