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

2508.30

Fire-clay

How this code is built
25

Chapter

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

08

Heading

The product family within the chapter

30

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. 2508Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths:
  3. Fire-clay

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.

  • 2508.30.00.00Fire-clayt
    General
    Free
    Special (FTA)
    —

    No preferential rate published.

    Column 2
    $1.97/t

    Countries without normal trade relations.

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 2508

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.