| 29.17 |  | Polycarboxylic acids, their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. | 
| 29.17 |  | Acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives : | 
| 2917.11 | 000 | Oxalic acid, its salts and esters | 
| 2917.12 |  | Adipic acid, its salts and esters | 
| 2917.12 | 010 | - Adipic acid | 
| 2917.13 | 000 | Azelaic acid, sebacic acid, their salts and esters | 
| 2917.20 | 000 | Cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives | 
| 2917.20 |  | Aromatic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives : | 
| 2917.34 |  | Other esters of orthophthalic acid | 
| 2917.36 | 000 | Terephthalic acid and its salts | 
| 2917.39 | 010 | -- Phthalic acid and isophthalic acid | 
| 29.18 |  | Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. | 
| 29.18 |  | Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives : | 
| 2918.11 | 000 | Lactic acid, its salts and esters | 
| 2918.12 | 000 | Tartaric acid | 
| 2918.13 | 000 | Salts and esters of tartaric acid | 
| 2918.14 | 000 | Citric acid | 
| 2918.15 |  | Salts and esters of citric acid | 
| 2918.16 | 000 | Gluconic acid, its salts and esters | 
| 2918.17 | 000 | 2,2-Diphenyl-2-hydroxyacetic acid (benzilic acid) | 
| 2918.19 | 010 | 1 Cholic acid | 
| 2918.19 |  | Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives : | 
| 2918.21 | 000 | Salicylic acid and its salts |