HTS heading
2510Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk:
Rates as published in 2026 HTS Revision 15, captured 2026-08-13. Source: USITC Harmonized Tariff Schedule.
Current duty rates (2 lines)
| Code | Description | General | Special | Column 2 |
|---|---|---|---|---|
| 2510.10.00.00 | Unground | Free | — | Free |
| 2510.20.00.00 | Ground | Free | — | Free |
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