| Tariff Classification |
| section 06 | Products of the chemical or allied industries |
| chapter 29 | Organic chemicals |
| 29.17 | Polycarboxylic acids, their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives: |
| －Aromatic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives: |
| 2917.35 | －－Phthalic anhydride |
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