| Tariff Classification |
| section 06 | Products of the chemical or allied industries |
| chapter 28 | Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes |
| 28.25 | Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides: |
| 2825.50 | －Copper oxides and hydroxides |
|