Section 06 Products of the chemical or allied 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 15 Salts and esters of citric acid 29 18 15 00 Salts and esters of citric acid Commodity Code Description 29 18 15 00 000 Salts and esters of citric acid