Section V · Salt; sulphur; earths and stone; plastering materials, lime and cement

2518.10

Dolomite, not calcined or sintered

How this code is built
25

Chapter

Salt; sulphur; earths and stone; plastering materials, lime and cement

18

Heading

The product family within the chapter

10

Subheading

The specific good, identical worldwide

The first six digits are the same in every country that uses the Harmonized System. The United States adds two more for the tariff rate and, often, two more for statistics — which is why the rates below are listed against 8- and 10-digit numbers rather than against this code.

How the schedule reaches this code

  1. 25Salt; sulphur; earths and stone; plastering materials, lime and cement
  2. 2518Dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:
  3. Dolomite, not calcined or sintered

Published US duty rates

Duty is set at the 8- or 10-digit line, not at this 6-digit subheading, so more than one rate can sit under this code.

  • 2518.10.00.00Dolomite, not calcined or sinteredt
    General
    Free
    Special (FTA)
    —

    No preferential rate published.

    Column 2
    Free

    Countries without normal trade relations.

Schedule footnotes

  • See 9903.88.03.

A reference to Chapter 99 means an additional action — a Section 232 or 301 measure, an exclusion, or a quota — applies on top of the rate above.

This is the listed rate. Antidumping and countervailing duty orders, Chapter 99 actions and preference qualification all change what is actually collected, and classification is a judgement about your goods. Verify with your licensed customs broker before you file.

Other subheadings in heading 2518

Source: U.S. International Trade Commission (USITC) — 2026 HTS Revision 12, released 2026-07-21, published at hts.usitc.gov. A U.S. Government work in the public domain.