Section 06 Products of the chemical or allied 29 Organic chemicals 29 18 Carboxylic acids with oxygen function, etc, their...derivatives 29 18 91 2,4,5-T (ISO) (2,4,5-trichlorophenoxyacetic acid), its salts and esters Commodity Code Description 29 18 91 00 2,4,5-T (ISO) (2,4,5-trichlorophenoxyacetic acid), its salts and esters