HTS 2528Natural 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
Rate lines3
Duty by country of origin
| Rate line | Bolivia44.32% of imports | Türkiye36.51% of imports | Peru10.48% of imports | Argentina5.58% of imports | Chile2.3% of imports | Malaysia0.43% of imports | Canada0.33% of imports | China0.05% of imports |
|---|---|---|---|---|---|---|---|---|
| 2528.00.00.05Natural sodium borates and concentrates thereof (whether or not calcined) | 0% | 12.5%9903.05.79 | 12.5%9903.05.63 | 10%9903.05.22 | 12.5%9903.05.30 | 10%9903.05.54 | 10%9903.05.29 | 37.5%9903.05.319903.88.03 |
| 2528.00.00.10Natural calcium borates | 0% | 12.5%9903.05.79 | 12.5%9903.05.63 | 10%9903.05.22 | 12.5%9903.05.30 | 10%9903.05.54 | 10%9903.05.29 | 37.5%9903.05.319903.88.03 |
| 2528.00.00.50Other | 0% | 12.5%9903.05.79 | 12.5%9903.05.63 | 10%9903.05.22 | 12.5%9903.05.30 | 10%9903.05.54 | 10%9903.05.29 | 37.5%9903.05.319903.88.03 |
Total duty on a $10,000 ocean shipment entered 2026-10-13, before customs fees. Origins are the leading sources of US imports under this heading in 2025 (US Census Bureau).