Analysis
HTS 2518.10.00 covers dolomite, not calcined or sintered under heading 2518 (dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or…).
Neighbouring lines carry rates from 3% to 3%, so the exact line matters. The widest gap is with 2518.20.00 (calcined or sintered dolomite), at 3%: a product that belongs there but is entered here, or the reverse, changes the duty by 3 percentage points.
Goods classified here enter the United States duty-free at the general (normal trade relations) rate, as do about 91% of the 78 tariff lines in chapter 25. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.
The other line in the same group is 2518.20.00 (calcined or sintered dolomite, 3%).
Census statistics map these goods to NAICS 212311 (Dimension Stone Mining and Quarrying), an industry of 379 US establishments employing 4,660 people. That is the industry code a US manufacturer of the same product would normally use.
The general rate of Free has not changed in any edition of the schedule since Jan 2023.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 2518.20.00 | Calcined or sintered dolomite | 3% |