Chapter 25
Salt; Sulfur; Earths and Stone
By TariffCenter Research Team · Updated 2026-02-07 · Source: USITC Harmonized Tariff Schedule
At a glance
Chapter 25 contains 144 HTS lines covering salt; sulfur; earths and stone. General U.S. duty rates: Free to 3%. Section 301 surcharges apply on selected lines for imports from China. Reciprocal tariffs apply following the February 2026 SCOTUS ruling.
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
#Heading 2501 contains 1 HTS line. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2501.00.00.00 | 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 | Free | 301: 25%Recip: 10% |
2502 — Unroasted iron pyrites
#Heading 2502 contains 1 HTS line. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2502.00.00.00 | Unroasted iron pyrites | Free | 301: 25%Recip: 10% |
2503 — Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur
#Heading 2503 contains 3 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2503.00.00
Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur
Free
2503.00.00.10
Crude or unrefined sulfur
Free
2503.00.00.90
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2503.00.00 | Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur | Free | 301: 25%Recip: 10% |
| 2503.00.00.10 | Crude or unrefined sulfur | Free | 301: 25%Recip: 10% |
| 2503.00.00.90 | Other | Free | 301: 25%Recip: 10% |
2504 — Natural graphite
#Heading 2504 contains 5 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2504
Natural graphite:
Free
2504.10
In powder or in flakes:
Free
2504.10.10.00
Crystalline flake (not including flake dust)
Free
2504.10.50.00
Other
Free
2504.90.00.00
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2504 | Natural graphite: | Free | 301: 25%Recip: 10% |
| 2504.10 | In powder or in flakes: | Free | 301: 25%Recip: 10% |
| 2504.10.10.00 | Crystalline flake (not including flake dust) | Free | 301: 25%Recip: 10% |
| 2504.10.50.00 | Other | Free | 301: 25%Recip: 10% |
| 2504.90.00.00 | Other | Free | 301: 25%Recip: 10% |
2505 — Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26
#Heading 2505 contains 5 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2505
Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26:
Free
2505.10
Silica sands and quartz sands:
Free
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
2505.10.50.00
Other
Free
2505.90.00.00
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2505 | Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26: | Free | 301: 25%Recip: 10% |
| 2505.10 | Silica sands and quartz sands: | Free | 301: 25%Recip: 10% |
| 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 | 301: 25%Recip: 10% |
| 2505.10.50.00 | Other | Free | 301: 25%Recip: 10% |
| 2505.90.00.00 | Other | Free | 301: 25%Recip: 10% |
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
#Heading 2506 contains 7 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
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:
Free
2506.10.00
Quartz
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
Free
2506.10.00.50
Other
Free
2506.20.00
Quartzite
Free
2506.20.00.10
Crude or roughly trimmed
Free
2506.20.00.80
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 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: | Free | 301: 25%Recip: 10% |
| 2506.10.00 | Quartz | Free | 301: 25%Recip: 10% |
| 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 | Free | 301: 25%Recip: 10% |
| 2506.10.00.50 | Other | Free | 301: 25%Recip: 10% |
| 2506.20.00 | Quartzite | Free | 301: 25%Recip: 10% |
| 2506.20.00.10 | Crude or roughly trimmed | Free | 301: 25%Recip: 10% |
| 2506.20.00.80 | Other | Free | 301: 25%Recip: 10% |
2507 — Kaolin and other kaolinic clays, whether or not calcined
#Heading 2507 contains 1 HTS line. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2507.00.00.00 | Kaolin and other kaolinic clays, whether or not calcined | Free | 301: 25%Recip: 10% |
2508 — Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths
#Heading 2508 contains 10 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2508
Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths:
Free
2508.10.00.00
Bentonite
Free
2508.30.00.00
Fire-clay
Free
2508.40.01
Other clays
Free
2508.40.01.10
Common blue clay and other ball clays
Free
2508.40.01.20
Decolorizing earths and fuller's earth
Free
2508.40.01.50
Other
Free
2508.50.00.00
Andalusite, kyanite and sillimanite
Free
2508.60.00.00
Mullite
Free
2508.70.00.00
Chamotte or dinas earth
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2508 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths: | Free | 301: 25%Recip: 10% |
| 2508.10.00.00 | Bentonite | Free | 301: 25%Recip: 10% |
| 2508.30.00.00 | Fire-clay | Free | 301: 25%Recip: 10% |
| 2508.40.01 | Other clays | Free | 301: 25%Recip: 10% |
| 2508.40.01.10 | Common blue clay and other ball clays | Free | 301: 25%Recip: 10% |
| 2508.40.01.20 | Decolorizing earths and fuller's earth | Free | 301: 25%Recip: 10% |
| 2508.40.01.50 | Other | Free | 301: 25%Recip: 10% |
| 2508.50.00.00 | Andalusite, kyanite and sillimanite | Free | 301: 25%Recip: 10% |
| 2508.60.00.00 | Mullite | Free | 301: 25%Recip: 10% |
| 2508.70.00.00 | Chamotte or dinas earth | Free | 301: 25%Recip: 10% |
2509 — Chalk
#Heading 2509 contains 3 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2509.00
Chalk:
Free
2509.00.10.00
Crude
Free
2509.00.20.00
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2509.00 | Chalk: | Free | 301: 25%Recip: 10% |
| 2509.00.10.00 | Crude | Free | 301: 25%Recip: 10% |
| 2509.00.20.00 | Other | Free | 301: 25%Recip: 10% |
2510 — Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk
#Heading 2510 contains 3 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2510
Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk:
Free
2510.10.00.00
Unground
Free
2510.20.00.00
Ground
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2510 | Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk: | Free | 301: 25%Recip: 10% |
| 2510.10.00.00 | Unground | Free | 301: 25%Recip: 10% |
| 2510.20.00.00 | Ground | Free | 301: 25%Recip: 10% |
2511 — Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816
#Heading 2511 contains 5 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2511
Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816:
Free
2511.10
Natural barium sulfate (barytes):
Free
2511.10.10.00
Ground
Free
2511.10.50.00
Other
$1.25/t
2511.20.00.00
Natural barium carbonate (witherite)
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2511 | Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816: | Free | 301: 25%Recip: 10% |
| 2511.10 | Natural barium sulfate (barytes): | Free | 301: 25%Recip: 10% |
| 2511.10.10.00 | Ground | Free | 301: 25%Recip: 10% |
| 2511.10.50.00 | Other | $1.25/t | 301: 25%Recip: 10%hts_special: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
| 2511.20.00.00 | Natural barium carbonate (witherite) | Free | 301: 25%Recip: 10% |
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
#Heading 2512 contains 1 HTS line. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2512.00.00.00 | 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 | Free | 301: 25%Recip: 10% |
2513 — Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated
#Heading 2513 contains 7 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2513
Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated:
Free
2513.10.00
Pumice stone
Free
2513.10.00.10
Crude or in irregular pieces, including crushed pumice
Free
2513.10.00.80
Other
Free
2513.20
Emery, natural corundum, natural garnet and other natural abrasives:
Free
2513.20.10.00
Crude or in irregular pieces
Free
2513.20.90.00
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2513 | Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated: | Free | 301: 25%Recip: 10% |
| 2513.10.00 | Pumice stone | Free | 301: 25%Recip: 10% |
| 2513.10.00.10 | Crude or in irregular pieces, including crushed pumice | Free | 301: 25%Recip: 10% |
| 2513.10.00.80 | Other | Free | 301: 25%Recip: 10% |
| 2513.20 | Emery, natural corundum, natural garnet and other natural abrasives: | Free | 301: 25%Recip: 10% |
| 2513.20.10.00 | Crude or in irregular pieces | Free | 301: 25%Recip: 10% |
| 2513.20.90.00 | Other | Free | 301: 25%Recip: 10% |
2514 — Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape
#Heading 2514 contains 1 HTS line. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2514.00.00.00 | Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape | Free | 301: 25%Recip: 10% |
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
#Heading 2515 contains 6 HTS lines. General U.S. duty rates: Free–3%. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
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:
Free
2515.11.00.00
Crude or roughly trimmed
Free
2515.12
Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:
Free
2515.12.10.00
Marble
Free
2515.12.20.00
Travertine
3%
2515.20.00.00
Other calcareous monumental or building stone; alabaster
3%
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 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: | Free | 301: 25%Recip: 10% |
| 2515.11.00.00 | Crude or roughly trimmed | Free | 301: 25%Recip: 10% |
| 2515.12 | Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape: | Free | 301: 25%Recip: 10% |
| 2515.12.10.00 | Marble | Free | 301: 25%Recip: 10% |
| 2515.12.20.00 | Travertine | 3% | 301: 25%Recip: 10%hts_special: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
| 2515.20.00.00 | Other calcareous monumental or building stone; alabaster | 3% | 301: 25%Recip: 10%hts_special: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
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
#Heading 2516 contains 11 HTS lines. General U.S. duty rates: Free–3%. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
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:
Free
2516.11.00.00
Crude or roughly trimmed
Free
2516.12.00
Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape
2.8%
2516.12.00.30
Having a thickness of 7.5 cm or more
Free
2516.12.00.60
Other
Free
2516.20
Sandstone:
Free
2516.20.10.00
Crude or roughly trimmed
Free
2516.20.20.00
Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape
3%
2516.90.00
Other monumental or building stone
3%
2516.90.00.30
Having a thickness of 7.5 cm or more
Free
2516.90.00.60
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 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: | Free | 301: 25%Recip: 10% |
| 2516.11.00.00 | Crude or roughly trimmed | Free | 301: 25%Recip: 10% |
| 2516.12.00 | Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape | 2.8% | 301: 25%Recip: 10%hts_special: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
| 2516.12.00.30 | Having a thickness of 7.5 cm or more | Free | 301: 25%Recip: 10% |
| 2516.12.00.60 | Other | Free | 301: 25%Recip: 10% |
| 2516.20 | Sandstone: | Free | 301: 25%Recip: 10% |
| 2516.20.10.00 | Crude or roughly trimmed | Free | 301: 25%Recip: 10% |
| 2516.20.20.00 | Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape | 3% | 301: 25%Recip: 10%hts_special: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
| 2516.90.00 | Other monumental or building stone | 3% | 301: 25%Recip: 10%hts_special: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
| 2516.90.00.30 | Having a thickness of 7.5 cm or more | Free | 301: 25%Recip: 10% |
| 2516.90.00.60 | Other | Free | 301: 25%Recip: 10% |
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
#Heading 2517 contains 9 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
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:
Free
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
2517.10.00.15
Pebbles and gravel
Free
2517.10.00.20
Limestone, except pebbles and gravel
Free
2517.10.00.55
Other
Free
2517.20.00.00
Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10
Free
2517.30.00.00
Tarred macadam
Free
2517.41.00.00
Of marble
Free
2517.49.00.00
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 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: | Free | 301: 25%Recip: 10% |
| 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 | 301: 25%Recip: 10% |
| 2517.10.00.15 | Pebbles and gravel | Free | 301: 25%Recip: 10% |
| 2517.10.00.20 | Limestone, except pebbles and gravel | Free | 301: 25%Recip: 10% |
| 2517.10.00.55 | Other | Free | 301: 25%Recip: 10% |
| 2517.20.00.00 | Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10 | Free | 301: 25%Recip: 10% |
| 2517.30.00.00 | Tarred macadam | Free | 301: 25%Recip: 10% |
| 2517.41.00.00 | Of marble | Free | 301: 25%Recip: 10% |
| 2517.49.00.00 | Other | Free | 301: 25%Recip: 10% |
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
#Heading 2518 contains 3 HTS lines. General U.S. duty rates: Free–3%. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
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:
Free
2518.10.00.00
Dolomite, not calcined or sintered
Free
2518.20.00.00
Calcined or sintered dolomite
3%
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 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: | Free | 301: 25%Recip: 10% |
| 2518.10.00.00 | Dolomite, not calcined or sintered | Free | 301: 25%Recip: 10% |
| 2518.20.00.00 | Calcined or sintered dolomite | 3% | 301: 25%Recip: 10%hts_special: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
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
#Heading 2519 contains 6 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
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:
Free
2519.10.00.00
Natural magnesium carbonate (magnesite)
Free
2519.90
Other:
Free
2519.90.10.00
Fused magnesia and dead-burned (sintered) magnesia
Free
2519.90.20.00
Caustic calcined magnesite
Free
2519.90.50.00
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 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: | Free | 301: 25%Recip: 10% |
| 2519.10.00.00 | Natural magnesium carbonate (magnesite) | Free | 301: 25%Recip: 10% |
| 2519.90 | Other: | Free | 301: 25%Recip: 10% |
| 2519.90.10.00 | Fused magnesia and dead-burned (sintered) magnesia | Free | 301: 25%Recip: 10% |
| 2519.90.20.00 | Caustic calcined magnesite | Free | 301: 25%Recip: 10% |
| 2519.90.50.00 | Other | Free | 301: 25%Recip: 10% |
2520 — Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders
#Heading 2520 contains 3 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2520
Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders:
Free
2520.10.00.00
Gypsum; anhydrite
Free
2520.20.00.00
Plasters
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2520 | Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders: | Free | 301: 25%Recip: 10% |
| 2520.10.00.00 | Gypsum; anhydrite | Free | 301: 25%Recip: 10% |
| 2520.20.00.00 | Plasters | Free | 301: 25%Recip: 10% |
2521 — Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement
#Heading 2521 contains 1 HTS line. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2521.00.00.00 | Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement | Free | 301: 25%Recip: 10% |
2522 — Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825
#Heading 2522 contains 4 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2522
Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825:
Free
2522.10.00.00
Quicklime
Free
2522.20.00.00
Slaked lime
Free
2522.30.00.00
Hydraulic lime
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2522 | Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825: | Free | 301: 25%Recip: 10% |
| 2522.10.00.00 | Quicklime | Free | 301: 25%Recip: 10% |
| 2522.20.00.00 | Slaked lime | Free | 301: 25%Recip: 10% |
| 2522.30.00.00 | Hydraulic lime | Free | 301: 25%Recip: 10% |
2523 — Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers
#Heading 2523 contains 6 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2523
Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers:
Free
2523.10.00.00
Cement clinkers
Free
2523.21.00.00
White cement, whether or not artificially colored
Free
2523.29.00.00
Other
Free
2523.30.00.00
Aluminous cement
Free
2523.90.00.00
Other hydraulic cements
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2523 | Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers: | Free | 301: 25%Recip: 10% |
| 2523.10.00.00 | Cement clinkers | Free | 301: 25%Recip: 10% |
| 2523.21.00.00 | White cement, whether or not artificially colored | Free | 301: 25%Recip: 10% |
| 2523.29.00.00 | Other | Free | 301: 25%Recip: 10% |
| 2523.30.00.00 | Aluminous cement | Free | 301: 25%Recip: 10% |
| 2523.90.00.00 | Other hydraulic cements | Free | 301: 25%Recip: 10% |
2524 — Asbestos
#Heading 2524 contains 9 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2524
Asbestos:
Free
2524.10.00.00
Crocidolite (Blue)
Free
2524.90.00
Other
Free
2524.90.00.10
Amosite
Free
2524.90.00.30
Crudes
Free
2524.90.00.40
Milled fibers, group 3 grades (spinning fibers or equivalent)
Free
2524.90.00.45
Milled fibers, group 4 and 5 grades
Free
2524.90.00.55
Other
Free
2524.90.00.60
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2524 | Asbestos: | Free | 301: 25%Recip: 10% |
| 2524.10.00.00 | Crocidolite (Blue) | Free | 301: 25%Recip: 10% |
| 2524.90.00 | Other | Free | 301: 25%Recip: 10% |
| 2524.90.00.10 | Amosite | Free | 301: 25%Recip: 10% |
| 2524.90.00.30 | Crudes | Free | 301: 25%Recip: 10% |
| 2524.90.00.40 | Milled fibers, group 3 grades (spinning fibers or equivalent) | Free | 301: 25%Recip: 10% |
| 2524.90.00.45 | Milled fibers, group 4 and 5 grades | Free | 301: 25%Recip: 10% |
| 2524.90.00.55 | Other | Free | 301: 25%Recip: 10% |
| 2524.90.00.60 | Other | Free | 301: 25%Recip: 10% |
2525 — Mica, including splittings; mica waste
#Heading 2525 contains 7 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2525
Mica, including splittings; mica waste:
Free
2525.10.00
Crude mica and mica rifted into sheets or splittings
Free
2525.10.00.10
Split block mica
Free
2525.10.00.20
Mica splittings
Free
2525.10.00.50
Other
Free
2525.20.00.00
Mica powder
Free
2525.30.00.00
Mica waste
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2525 | Mica, including splittings; mica waste: | Free | 301: 25%Recip: 10% |
| 2525.10.00 | Crude mica and mica rifted into sheets or splittings | Free | 301: 25%Recip: 10% |
| 2525.10.00.10 | Split block mica | Free | 301: 25%Recip: 10% |
| 2525.10.00.20 | Mica splittings | Free | 301: 25%Recip: 10% |
| 2525.10.00.50 | Other | Free | 301: 25%Recip: 10% |
| 2525.20.00.00 | Mica powder | Free | 301: 25%Recip: 10% |
| 2525.30.00.00 | Mica waste | Free | 301: 25%Recip: 10% |
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
#Heading 2526 contains 3 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
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:
Free
2526.10.00.00
Not crushed, not powdered
Free
2526.20.00.00
Crushed or powdered
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 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: | Free | 301: 25%Recip: 10% |
| 2526.10.00.00 | Not crushed, not powdered | Free | 301: 25%Recip: 10% |
| 2526.20.00.00 | Crushed or powdered | Free | 301: 25%Recip: 10% |
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
#Heading 2528 contains 4 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
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
2528.00.00.05
Natural sodium borates and concentrates thereof (whether or not calcined)
Free
2528.00.00.10
Natural calcium borates
Free
2528.00.00.50
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 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 | 301: 25%Recip: 10% |
| 2528.00.00.05 | Natural sodium borates and concentrates thereof (whether or not calcined) | Free | 301: 25%Recip: 10% |
| 2528.00.00.10 | Natural calcium borates | Free | 301: 25%Recip: 10% |
| 2528.00.00.50 | Other | Free | 301: 25%Recip: 10% |
2529 — Feldspar; leucite, nepheline and nepheline syenite; fluorspar
#Heading 2529 contains 7 HTS lines. General U.S. duty rates: Free. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2529
Feldspar; leucite, nepheline and nepheline syenite; fluorspar:
Free
2529.10.00.00
Feldspar
Free
2529.21.00.00
Containing by weight 97 percent or less of calcium fluoride
Free
2529.22.00.00
Containing by weight more than 97 percent of calcium fluoride
Free
2529.30.00
Leucite; nepheline and nepheline syenite
Free
2529.30.00.10
Nepheline syenite
Free
2529.30.00.50
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2529 | Feldspar; leucite, nepheline and nepheline syenite; fluorspar: | Free | 301: 25%Recip: 10% |
| 2529.10.00.00 | Feldspar | Free | 301: 25%Recip: 10% |
| 2529.21.00.00 | Containing by weight 97 percent or less of calcium fluoride | Free | 301: 25%Recip: 10% |
| 2529.22.00.00 | Containing by weight more than 97 percent of calcium fluoride | Free | 301: 25%Recip: 10% |
| 2529.30.00 | Leucite; nepheline and nepheline syenite | Free | 301: 25%Recip: 10% |
| 2529.30.00.10 | Nepheline syenite | Free | 301: 25%Recip: 10% |
| 2529.30.00.50 | Other | Free | 301: 25%Recip: 10% |
2530 — Mineral substances not elsewhere specified or included
#Heading 2530 contains 12 HTS lines. General U.S. duty rates: Free–2.9%. Section 301 surcharges (25%) and reciprocal tariffs (10%) apply to selected lines.
2530
Mineral substances not elsewhere specified or included:
Free
2530.10.00.00
Vermiculite, perlite and chlorites, unexpanded
Free
2530.20
Kieserite, epsom salts (natural magnesium sulfates):
Free
2530.20.10.00
Kieserite
Free
2530.20.20.00
Epsom salts
Free
2530.90
Other:
Free
2530.90.10.00
Natural cryolite; natural chiolite
Free
2530.90.20.00
Natural micaceous iron oxides
2.9%
2530.90.80
Other
Free
2530.90.80.10
Celestite
Free
2530.90.80.15
Earth colors
Free
2530.90.80.50
Other
Free
| HS Code | Description | General Rate | Special Rates |
|---|---|---|---|
| 2530 | Mineral substances not elsewhere specified or included: | Free | 301: 25%Recip: 10% |
| 2530.10.00.00 | Vermiculite, perlite and chlorites, unexpanded | Free | 301: 25%Recip: 10% |
| 2530.20 | Kieserite, epsom salts (natural magnesium sulfates): | Free | 301: 25%Recip: 10% |
| 2530.20.10.00 | Kieserite | Free | 301: 25%Recip: 10% |
| 2530.20.20.00 | Epsom salts | Free | 301: 25%Recip: 10% |
| 2530.90 | Other: | Free | 301: 25%Recip: 10% |
| 2530.90.10.00 | Natural cryolite; natural chiolite | Free | 301: 25%Recip: 10% |
| 2530.90.20.00 | Natural micaceous iron oxides | 2.9% | 301: 25%Recip: 10%hts_special: Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
| 2530.90.80 | Other | Free | 301: 25%Recip: 10% |
| 2530.90.80.10 | Celestite | Free | 301: 25%Recip: 10% |
| 2530.90.80.15 | Earth colors | Free | 301: 25%Recip: 10% |
| 2530.90.80.50 | Other | Free | 301: 25%Recip: 10% |
Frequently Asked Questions — Chapter 25
Sources & Methodology
- Base HTS rates: U.S. International Trade Commission — Harmonized Tariff Schedule (2025 edition, Chapter 25). “General rate” shows the min–max range across all 10-digit subheadings.
- Section 301 rates: Office of the U.S. Trade Representative — Section 301 action lists. Flags indicate HTS lines listed on USTR China 301 Lists 1–4B.
- Reciprocal tariffs: Based on the post-SCOTUS Section 122 framework (February 2026). See the TariffCenter Tariff Tracker for current program status.
- Verify before importing: U.S. Customs and Border Protection — Rulings Online or consult a licensed customs broker for binding classification rulings.
Glossary
- General rate (MFN rate)
- The base import duty applied to all World Trade Organization members under Most-Favored-Nation treatment. This is the standard rate shown in the General Rate column.
- Section 301 tariff (301: 25%)
- An additional surcharge authorized under Section 301 of the Trade Act of 1974, imposed on selected imports from China. The most common rate is 25%; some products carry 7.5%. Applied on top of the MFN base rate.
- Reciprocal tariff (Recip: 10%)
- Tariffs applied under the post-February 2026 SCOTUS ruling upholding Section 122 authority. Typically 10–25% depending on country of origin, stacked on top of base and Section 301 rates.
- Section 232 tariff (S232: 25%)
- Tariffs on steel and aluminum products (and downstream derivatives) imposed under Section 232 of the Trade Expansion Act of 1962 on national security grounds.
- hts_special / Special rates
- Preferential duty rates available to imports from countries with Free Trade Agreements or other special trade programs with the U.S. Country codes: AU (Australia), BH (Bahrain), CA (Canada), CL (Chile), CO (Colombia), IL (Israel), JO (Jordan), KR (South Korea), MA (Morocco), MX (Mexico), OM (Oman), PA (Panama), PE (Peru), SG (Singapore). Free (AU,BH...) means duty-free treatment for those partners.