Chapter 25: Salt; sulfur; earths and stone; plastering materials, lime and cement
HTS heading 2528: Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric a…
4 numbered lines under heading 2528, including 3 10-digit statistical lines. The first six digits are the international HS subheading; the general column is the normal US duty rate.
| HTS code | Description | Unit | General | Special | Column 2 |
|---|---|---|---|---|---|
| 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 | Free | Free | ||
| 2528.00.00.05 | Natural sodium borates and concentrates thereof (whether or not calcined) | kg | |||
| 2528.00.00.10 | Natural calcium borates | kg | |||
| 2528.00.00.50 | Other | kg |
Statistical (10-digit) lines without a rate use the rate of the 8-digit line above them. Additional duties such as Section 301 and Section 232 may apply; check them with the tariff checker.
Free tools
Free customs and shipping tools
HTS Code Lookup
Search the full US Harmonized Tariff Schedule by product or code, with duty rates.
De Minimis & Tariff Checker
US de minimis status and the Section 301/232 tariffs that may apply to an import.
Landed Cost & Duty Calculator
Estimate import duties, taxes and fees so you can price DDP.
Commercial Invoice Generator
Make a customs-ready commercial invoice with HS codes, plus CN 22/CN 23-style declarations.
Want us to find the money leaking out of your shipping? Get a free profit-leak audit.
Request a free auditSource: Harmonized Tariff Schedule of the United States, 2026 HTS Revision 20 (effective 2026-09-28), U.S. International Trade Commission (hts.usitc.gov), imported 2026-10-07. Reference only; not legal or customs advice or a binding classification. Additional duties under Chapter 99 may apply. ShipWave is not affiliated with the USITC or U.S. Customs and Border Protection.