HTS Chapter 25: Salt; sulphur; earths and stone; plastering materials, lime and cement
HTS Chapter 25 covers Salt; sulphur; earths and stone; plastering materials, lime and cement. Browse 20 published headings, then narrow to the active product line that matches the goods.
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS Chapter 25 generally covers salt; sulfur; earths, stone, plastering materials, lime, cement, and similar mineral products in their natural, processed, or heat-treated forms. The representative headings include natural graphite, sands, quartz, clays, phosphates, barytes, pumice and other abrasives, building stone, aggregates, dolomite, magnesia, gypsum, and lime. Classification can depend on the product’s mineral composition, physical form, processing, and sometimes its intended use.
The HTS is hierarchical: a chapter contains headings, headings contain subheadings, and the complete U.S. classification normally ends in a 10-digit statistical reporting number. Start with the heading that describes the material, then read every applicable subheading and the legal notes, rather than choosing a code based only on a product name or marketing description. Confirm whether the goods remain within Chapter 25 or are excluded because of composition, preparation, use, or classification elsewhere, and check current U.S. requirements for any Chapter 99 provisions or other measures that may apply in addition to the base classification.
What to check
- Identify the product’s exact mineral or chemical composition, including whether it is natural, mixed, purified, calcined, sintered, fused, expanded, or otherwise processed.
- Record the physical form and dimensions, such as loose material, powder, granules, blocks, slabs, aggregates, or prepared plaster; these details can change the subheading.
- Read the heading and subheading notes for exclusions, especially provisions directing chemically defined compounds, expanded materials, metal-bearing sands, or prepared products to other chapters or headings.
- Do not classify solely by the product’s end use: compare material, processing, and form first, then apply any use-based language in the tariff.
- After selecting the 10-digit code, check the current HTSUS for Chapter 99 measures, quota or trade remedies, and other entry requirements; obtain a customs broker’s or classification specialist’s review when composition or processing is unclear.
How to use this chapter
A chapter is the first classification level, not a duty rate. Choose the heading that describes the product, narrow by material, construction, use, or other legal distinctions, and verify the final line against the official HTS notes.
Heading list
| HTS code | Description | Linked 8-digit entries |
|---|---|---|
| 2504 | Natural graphite: | 0 |
| 2505 | Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26: | 0 |
| 2506 | Quartz (other than natural sands); quartzite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape: | 2 |
| 2508 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths: | 1 |
| 2510 | Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk: | 0 |
| 2511 | Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816: | 0 |
| 2513 | Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated: | 1 |
| 2515 | Marble, travertine and other calcareous monumental or building stone of an apparent specific gravity of 2.5 or more, and alabaster, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape: | 0 |
| 2516 | Granite, porphyry, basalt, sandstone and other monumental or building stone, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape: | 2 |
| 2517 | Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for road metalling, or for railway or other ballast; shingle and flint, whether or not heat-treated; macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in the first part of the heading; tarred macadam; granules, chippings and powder, of stones of heading 2515 or 2516, whether or not heat-treated: | 1 |
| 2518 | Dolomite, 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: | 0 |
| 2519 | Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure: | 0 |
| 2520 | Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders: | 0 |
| 2522 | Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825: | 0 |
| 2523 | Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers: | 0 |
| 2524 | Asbestos: | 1 |
| 2525 | Mica, including splittings; mica waste: | 1 |
| 2526 | Natural steatite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape; talc: | 0 |
| 2529 | Feldspar; leucite, nepheline and nepheline syenite; fluorspar: | 1 |
| 2530 | Mineral substances not elsewhere specified or included: | 0 |
Linked measures
0 linked measure entries in the current snapshot.
Questions about HTS Chapter 25
What does HTS Chapter 25 cover?
HTS Chapter 25 covers Salt; sulphur; earths and stone; plastering materials, lime and cement. This page groups the chapter’s 4-digit headings; a shipment still needs the most specific active 8- or 10-digit line supported by the product facts.
Is HTS Chapter 25 a final product classification?
No. A chapter is a broad 2-digit category. Narrow it to the applicable heading and the most specific active statistical line before estimating duty or filing an entry.