Chapter 29 — Organic chemicals

Heading 2918 — Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives.

National subdivision 2918.1 — Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives:

Subheading 2918.15 — Salts and esters of citric acid