Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 15 Saturated acyclic monocarboxylic acids and their anhydrides ...; their ... derivatives 29 15 50 Propionic acid, its salts and esters 29 15 50 00 Propionic acid, its salts and esters Commodity Code Description 29 15 50 00 000 Propionic acid, its salts and esters