Analysis
HTS 2509.00.10 covers chalk: crude under heading 2509 (chalk).
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 2509.00.20 (chalk: other, duty-free).
Census statistics map these goods to NAICS 212312 (Crushed and Broken Limestone Mining and Quarrying), an industry of 1,376 US establishments employing 25,735 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 |
|---|---|---|
| 2509.00.20 | Chalk: other | Free |