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 23 Other esters of salicylic acid and their salts Commodity Code Description 29 18 23 00 Other esters of salicylic acid and their salts