Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 04 Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated. 29 04 10 derivatives containing only sulpho groups, their salts, and ethyl esters Commodity Code Description 29 04 10 00 derivatives containing only sulpho groups, their salts, and ethyl esters