What does HTS Chapter 25 cover?

Chapter 25 of the U.S. Harmonized Tariff Schedule (HTSUS) covers Salt; sulfur; earths and stone; plastering materials, lime and cement. It sits within Section V: Mineral Products. Tandom's catalog lists all 101 10-digit statistical lines and 20 4-digit headings in this chapter.

What is the typical U.S. duty rate for Chapter 25 imports?

General (Column 1) duty rates for ad-valorem lines range from 2.8% to 3% (median 3%); roughly 91% of lines enter duty-free. Use the calculator linked from each code page to compute the full landed rate, including Section 301/232 overlays, IEEPA tariffs, and AD/CVD deposits where applicable.

Are Section 301 or Section 232 tariffs applied to Chapter 25 products?

Section 301 (China) and Section 232 (steel, aluminum, copper) tariffs are layered on top of the base HTSUS rate via Chapter 99 provisions. Whether they apply to a specific 10-digit line in Chapter 25 depends on the product's country of origin, material content, and the active proclamation. Open any code in this chapter to see the live overlay stack and effective rate.

Are there antidumping or countervailing duty (AD/CVD) orders covering Chapter 25 products?

AD/CVD orders are issued at the case level by the Department of Commerce against specific products from specific countries. Tandom's AD/CVD catalog cross-references every active order to the HTS codes it covers — open any code in Chapter 25 to see flagged orders, deposit rates, and the underlying scope determinations.

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Section V: Mineral Products

Chapter 25: Salt; sulfur; earths and stone; plastering materials, lime and cement

Chapter 25 of the U.S. Harmonized Tariff Schedule covers Salt; sulfur; earths and stone; plastering materials, lime and cement and sits within Section V: Mineral Products.

About Chapter 25

Chapter 25 contains 101 10-digit statistical lines grouped under 20 4-digit headings. Brokers, importers, and customs counsel use these codes to declare salt; sulfur; earths and stone; plastering materials, lime and cement on entry summaries (CBP Form 7501) and to look up the applicable Column 1, Special, and Column 2 duty rates.

General (Column 1) duty rates for ad-valorem lines in Chapter 25 range from 2.8% to 3%, with a median of 3%. About 85% of the chapter's lines (86 of 101) enter duty-free under the general rate. Special-program rates (USMCA, KORUS, GSP, AGOA, and others) and Chapter 99 overlays modify these base rates for qualifying shipments.

Every code page links into the Tandom Tariff Calculator with the HTS code prefilled, so you can compute the full landed duty for a specific shipment by entering value, country of origin, and (where relevant) material content or date of entry. Tandom's data refreshes daily from USITC HTSUS, CBP CSMS, the Federal Register, and the Department of Commerce — the same authoritative sources the trade community files against.

Code	Description	General	Column 2	Special	Units
2503.00.00	Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur	Free	Free	—	—
2503.00.00.10	Crude or unrefined sulfur	—	—

Code	Description	General	Column 2	Special	Units
2504.10	In powder or in flakes:	—	—	—	—
2504.10.10.00	·Crystalline flake (not including flake dust)	Free	3.6¢/kg

Code	Description	General	Column 2	Special	Units
2505.10	Silica sands and quartz sands:	—	—	—	—
2505.10.10.00	·Sand containing by weight 95 percent or more of silica and not more than 0.6 percent of oxide of iron	Free

Code	Description	General	Column 2	Special	Units
2506.10.00	Quartz	Free	Free	—	—
2506.10.00.10	·Sands (other than natural) containing by weight 95 percent or more of silica and not more than 0.6 percent of oxide of iron

Code	Description	General	Column 2	Special	Units
2508.10.00.00	Bentonite	Free	$3.20/t	—	t
2508.30.00.00	Fire-clay	Free	$1.97/t

Chapter 25: Salt; sulfur; earths and stone; plastering materials, lime and cement

`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

`2502`Unroasted iron pyrites

`2503`

`2504`Natural graphite:

`2505`Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26:

`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:

`2507`Kaolin and other kaolinic clays, whether or not calcined

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

`2509`

`2510`Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk:

`2511`Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816:

`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

`2513`Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated:

`2514`Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

`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:

`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:

`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:

`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:

`2520`Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders:

`2521`Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement

`2522`Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825:

`2523`Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers:

`2524`Asbestos:

`2525`Mica, including splittings; mica waste:

`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:

`2528`

`2529`Feldspar; leucite, nepheline and nepheline syenite; fluorspar:

`2530`Mineral substances not elsewhere specified or included:

Frequently asked questions

What does HTS Chapter 25 cover?

What is the typical U.S. duty rate for Chapter 25 imports?

Are Section 301 or Section 232 tariffs applied to Chapter 25 products?

Are there antidumping or countervailing duty (AD/CVD) orders covering Chapter 25 products?

Code	Description	General	Column 2	Special	Units
2510.10.00.00	Unground	Free	Free	—	t
2510.20.00.00	Ground	Free	Free

Code	Description	General	Column 2	Special	Units
2511.10	Natural barium sulfate (barytes):	—	—	—	—
2511.10.10.00	·Ground	Free	$7.38/t

Code	Description	General	Column 2	Special	Units
2513.10.00	Pumice stone	Free	Free	—	—
2513.10.00.10	·Crude or in irregular pieces, including crushed pumice	Free

Code	Description	General	Column 2	Special	Units
2515.11.00.00	·Crude or roughly trimmed	Free	$22.95/m3	—	m3, t
2515.12	·Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:

Code	Description	General	Column 2	Special	Units
2516.11.00.00	·Crude or roughly trimmed	Free	$8.83/m3	—	m3, t
2516.12.00	·Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

Code	Description	General	Column 2	Special	Units
2517.10.00	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	Free	30%	—	—

Code	Description	General	Column 2	Special	Units
2518.10.00.00	Dolomite, not calcined or sintered	Free	Free	—	t
2518.20.00.00	Calcined or sintered dolomite	3%

Code	Description	General	Column 2	Special	Units
2519.10.00.00	Natural magnesium carbonate (magnesite)	Free	$10.33/t	—	t
2519.90	Other:	—

Code	Description	General	Column 2	Special	Units
2520.10.00.00	Gypsum; anhydrite	Free	Free	—	t
2520.20.00.00	Plasters	Free	$1.38/t

Code	Description	General	Column 2	Special	Units
2522.10.00.00	Quicklime	Free	0.2¢/kg, including weight of container	—	kg
2522.20.00.00	Slaked lime	Free	0.3¢/kg, including weight of container

Code	Description	General	Column 2	Special	Units
2523.10.00.00	Cement clinkers	Free	$1.32/t, including weight of container	—	t
2523.21.00.00	·White cement, whether or not artificially colored	Free

Code	Description	General	Column 2	Special	Units
2524.10.00.00	Crocidolite (Blue)	Free	Free	—	t
2524.90.00	Other	Free	Free	—

Code	Description	General	Column 2	Special	Units
2525.10.00	Crude mica and mica rifted into sheets or splittings	Free	Free	—	—
2525.10.00.10	·Split block mica	Free	Free

Code	Description	General	Column 2	Special	Units
2526.10.00.00	Not crushed, not powdered	Free	0.6¢/kg	—	kg
2526.20.00.00	Crushed or powdered	Free

Code	Description	General	Column 2	Special	Units
2528.00.00	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	Free	Free	—	—
2528.00.00.05	Natural sodium borates and concentrates thereof (whether or not calcined)

Code	Description	General	Column 2	Special	Units
2529.10.00.00	Feldspar	Free	49¢/t	—	t
2529.21.00.00	·Containing by weight 97 percent or less of calcium fluoride	Free

Code	Description	General	Column 2	Special	Units
2530.10.00.00	Vermiculite, perlite and chlorites, unexpanded	Free	Free	—	kg
2530.20	Kieserite, epsom salts (natural magnesium sulfates):	—	—

2501Salt (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

2502Unroasted iron pyrites

2503

2504Natural graphite:

2505Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26:

2506Quartz (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:

2507Kaolin and other kaolinic clays, whether or not calcined

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

2509

2510Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk:

2511Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816:

2512Siliceous 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

2513Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated:

2514Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

2515Marble, 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:

2516Granite, 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:

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:

2519Natural 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:

2520Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders:

2521Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement

2522Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825:

2523Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers:

2524Asbestos:

2525Mica, including splittings; mica waste:

2526Natural steatite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape; talc:

2528

2529Feldspar; leucite, nepheline and nepheline syenite; fluorspar:

2530Mineral substances not elsewhere specified or included:

Frequently asked questions

What does HTS Chapter 25 cover?

What is the typical U.S. duty rate for Chapter 25 imports?

Are Section 301 or Section 232 tariffs applied to Chapter 25 products?

Are there antidumping or countervailing duty (AD/CVD) orders covering Chapter 25 products?

`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

`2502`Unroasted iron pyrites

`2503`

`2504`Natural graphite:

`2505`Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26:

`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:

`2507`Kaolin and other kaolinic clays, whether or not calcined

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

`2509`

`2510`Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk:

`2511`Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816:

`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

`2513`Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated:

`2514`Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

`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:

`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:

`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:

`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:

`2520`Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders:

`2521`Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement

`2522`Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825:

`2523`Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers:

`2524`Asbestos:

`2525`Mica, including splittings; mica waste:

`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:

`2528`

`2529`Feldspar; leucite, nepheline and nepheline syenite; fluorspar:

`2530`Mineral substances not elsewhere specified or included: