HTS heading 2528
Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 percent of H3BO3 calculated on the dry weight — 4 codes under this heading, with the duty on each.
| Code | Description | General rate | Units |
|---|---|---|---|
| 2528.00.00 | Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 percent of H3BO3 calculated on the dry weight + Ch. 99 | Free | — |
| 2528.00.00.05 | Natural sodium borates and concentrates thereof (whether or not calcined) + Ch. 99 | Free (inherited from 2528.00.00) | kg |
| 2528.00.00.10 | Natural calcium borates + Ch. 99 | Free (inherited from 2528.00.00) | kg |
| 2528.00.00.50 | Other + Ch. 99 | Free (inherited from 2528.00.00) | kg |
3 of these lines state no rate of their own and inherit one from the line above, which is how the schedule is read. Each says which line it came from.
Additional duties may apply
4 lines here reference Chapter 99, where Section 301, Section 232 and other additional duties live. Those are charged on top of the general rate and depend on where the goods were made. What those provisions are.
Source: Harmonized Tariff Schedule of the United States, U.S. International Trade Commission (public domain). Classification and the duties that finally apply to a shipment are a licensed customs broker's call.