Analysis
Subheading 2825.50 covers copper oxides and hydroxides, within heading 2825. The first six digits are shared by every country that uses the Harmonized System, so this part of the code is the same in the US, UK and EU schedules; the 3 US tariff lines below it are national.
None of its 3 lines is duty-free at the general rate. Rates run from 3.9% to 5% with a median of 4.3%, so the line you choose sets the duty.
The US splits it as follows: 2825.50.10 for copper oxides and hydroxides: cupric oxide (4.3%), 2825.50.20 for copper oxides and hydroxides: cuprous oxide (5%) and 2825.50.30 for copper oxides and hydroxides: copper hydroxides (3.9%).
By Census's concordance, most of its statistical lines are made by Other Basic Inorganic Chemical Manufacturing (325180). Those are the NAICS industries a US producer of these goods would report under.
Goods only reach 2825.50 once they fall within heading 2825 (hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal…). Under General Rule 6, subheadings are then compared only with others at the same level, so a product is matched against its siblings, not against lines elsewhere in the chapter.
Tariff lines
| Line | Description | General rate |
|---|---|---|
| 2825.50.10 | Copper oxides and hydroxides: cupric oxide | 4.3% |
| 2825.50.20 | Copper oxides and hydroxides: cuprous oxide | 5% |
| 2825.50.30 | Copper oxides and hydroxides: copper hydroxides | 3.9% |