Chapter 25 HS Codes: Chapter 25 Commodities
CHAPTER DEFINITION & SCOPE
HS Chapter 25 of the WCO Harmonized System covers chapter 25 commodities. It groups 29 4-digit WCO headings and 67 6-digit subheadings under the official 2026 customs nomenclature [USITC HTS 2026].
Chapter
Ch 25
Headings
29 Headings
Subheadings
67 HS6
US Tariff Status
Active 2026
Chapter 25 4-Digit Headings Directory
| Heading | WCO Heading Description | Subheading Count | Directory Link |
|---|---|---|---|
| Heading 2501 | Salt (including table salt and denatured salt) and pure sodium chloride, whether or not in aqueous solution or containing added anti-caking or free-flowing agents; sea water | 1 subheadings | Browse Heading 2501 → |
| Heading 2502 | Unroasted iron pyrites | 1 subheadings | Browse Heading 2502 → |
| Heading 2503 | Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur | 1 subheadings | Browse Heading 2503 → |
| Heading 2504 | Natural graphite | 2 subheadings | Browse Heading 2504 → |
| Heading 2505 | Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26 | 2 subheadings | Browse Heading 2505 → |
| Heading 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 subheadings | Browse Heading 2506 → |
| Heading 2507 | Kaolin and other kaolinic clays, whether or not calcined | 1 subheadings | Browse Heading 2507 → |
| Heading 2508 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths | 6 subheadings | Browse Heading 2508 → |
| Heading 2509 | Chalk | 1 subheadings | Browse Heading 2509 → |
| Heading 2510 | Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk | 2 subheadings | Browse Heading 2510 → |
| Heading 2511 | Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816 | 2 subheadings | Browse Heading 2511 → |
| Heading 2512 | Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less | 1 subheadings | Browse Heading 2512 → |
| Heading 2513 | Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated | 2 subheadings | Browse Heading 2513 → |
| Heading 2514 | Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape | 1 subheadings | Browse Heading 2514 → |
| Heading 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 | 3 subheadings | Browse Heading 2515 → |
| Heading 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 | 4 subheadings | Browse Heading 2516 → |
| Heading 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 | 5 subheadings | Browse Heading 2517 → |
| Heading 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 | 2 subheadings | Browse Heading 2518 → |
| Heading 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 | 2 subheadings | Browse Heading 2519 → |
| Heading 2520 | Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders | 2 subheadings | Browse Heading 2520 → |
| Heading 2521 | Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement | 1 subheadings | Browse Heading 2521 → |
| Heading 2522 | Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825 | 3 subheadings | Browse Heading 2522 → |
| Heading 2523 | Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers | 5 subheadings | Browse Heading 2523 → |
| Heading 2524 | Asbestos | 2 subheadings | Browse Heading 2524 → |
| Heading 2525 | Mica, including splittings; mica waste | 3 subheadings | Browse Heading 2525 → |
| Heading 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 | 2 subheadings | Browse Heading 2526 → |
| Heading 2528 | Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 percent of H3BO3 calculated on the dry weight | 1 subheadings | Browse Heading 2528 → |
| Heading 2529 | Feldspar; leucite, nepheline and nepheline syenite; fluorspar | 4 subheadings | Browse Heading 2529 → |
| Heading 2530 | Mineral substances not elsewhere specified or included | 3 subheadings | Browse Heading 2530 → |
Chapter 25 Subheading Sample & MFN Duty Rates
| HS Code | Subheading Description | Heading | Action |
|---|---|---|---|
| 2501.00 | Salt (including table salt and denatured salt) and pure sodium chloride, whether or not in aqueous solution or containing added anti-caking or free-flowing agents; sea water | 2501 | View 2501.00 → |
| 2502.00 | Unroasted iron pyrites | 2502 | View 2502.00 → |
| 2503.00 | Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur | 2503 | View 2503.00 → |
| 2504.10 | Natural graphite, In powder or in flakes | 2504 | View 2504.10 → |
| 2504.90 | Natural graphite, Other | 2504 | View 2504.90 → |
| 2505.10 | Silica sands and quartz sands | 2505 | View 2505.10 → |
| 2505.90 | Other | 2505 | View 2505.90 → |
| 2506.10 | Quartz | 2506 | View 2506.10 → |
| 2506.20 | Quartzite | 2506 | View 2506.20 → |
| 2507.00 | Kaolin and other kaolinic clays, whether or not calcined | 2507 | View 2507.00 → |
| 2508.10 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths, Bentonite | 2508 | View 2508.10 → |
| 2508.30 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths, Fire-clay | 2508 | View 2508.30 → |
| 2508.40 | Other clays | 2508 | View 2508.40 → |
| 2508.50 | Andalusite, kyanite and sillimanite | 2508 | View 2508.50 → |
| 2508.60 | Mullite | 2508 | View 2508.60 → |
EXPERT CLASSIFICATION PRO TIPS
Common Pitfalls When Classifying Chapter 25 Goods
- Always review WCO Section and Chapter Legal Notes before assigning 4-digit headings.
- Distinguish carefully between unprocessed raw materials and further prepared or processed articles.
- Verify Partner Government Agency (PGA) flags for agriculture, food, or chemical items.
- Cross-reference official CBP CROSS rulings for binding precedents on mixed or composite goods.
Official Primary Sources & Authority References
USITC HTS Chapter 25 Tariff ↗
United States International Trade Commission official Harmonized Tariff Schedule.
CBP CROSS Rulings ↗
Customs Rulings Online Search System for Chapter 25 binding classification precedents.
WCO HS Nomenclature ↗
World Customs Organization international 6-digit Harmonized System backbone standard.
U.S. Census Foreign Trade ↗
U.S. Census Bureau trade statistics and Schedule B concordance portal.
Chapter 25 Frequently Asked Questions (FAQ)
What commodities are covered under HS Chapter 25?
Chapter 25 (Chapter 25 Commodities) covers WCO Harmonized System 4-digit headings from 2501 upward, encompassing primary goods, raw materials, and manufactured articles within this nomenclature section.
How many 4-digit headings exist in HS Chapter 25?
Chapter 25 contains 29 official 4-digit WCO headings and 67 6-digit tariff subheadings.
What is the US general import duty range for Chapter 25 commodities?
Base customs duties under Chapter 25 range from 0.0% (Duty-Free) up to representative MFN rate limits depending on 10-digit HTS statistical suffix extensions.
Do Section 301 China tariffs apply to Chapter 25 imports?
Section 301 tariffs depend on specific 8-digit HTS subheadings. Importers must verify if their exact HTS code appears on USTR Lists 1 through 4A.
Are Partner Government Agency (PGA) permits required for Chapter 25?
PGA message-set flags (such as FDA, USDA APHIS, EPA, or CITES) apply conditionally depending on the commodity classification within Chapter 25.
How are products classified between adjacent headings in Chapter 25?
Classification follows WCO General Rules of Interpretation (GRI) 1 through 6, prioritizing specific heading terms over general descriptions.
Can Chapter 25 goods enter duty-free under USMCA or Free Trade Agreements?
Yes. Eligible goods originating in USMCA member states (US, Mexico, Canada) or FTA partners enter duty-free under SPI code P, KR, AU, or CL with a valid Certificate of Origin.
What is the Section 321 de minimis limit for Chapter 25 shipments?
Eligible commercial shipments valued at $800 USD or less imported by one person on one day may enter duty-free under 19 U.S.C. 1321.
What documents are required for formal entry of Chapter 25 goods?
Commercial Invoice, Packing List, Bill of Lading/Air Waybill, and entry summary CBP Form 7501 are mandatory for entries exceeding $2,500 USD.
How can an importer obtain a binding CBP ruling for Chapter 25?
Importers may submit an e-Ruling application under 19 CFR Part 177 to CBP National Commodity Specialist Division.