HTS chapter 25: duty rates for all 79 tariff lines 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. 71 lines are duty-free at the general rate; 67 are on a Section 301 China list.
Official USITC HTS, 2026HTSRev20
2501: Salt (including table salt and denatured salt) and pure sodium chloride, whether or not in aqueous solution or containing added anti-caking … Line Description General Section 301 (China) 2501.00.00 Salt (including table salt and denatured salt) and pure sodium chloride, whether or not in aqu… Free List 3 +25%
2502: Unroasted iron pyrites Line Description General Section 301 (China) 2502.00.00 Unroasted iron pyrites Free List 3 +25%
2503: Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur Line Description General Section 301 (China) 2503.00.00 Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur Free List 3 +25%
2504: Natural graphite Line Description General Section 301 (China) 2504.10.10 Crystalline flake (not including flake dust) Free Four-year review +25% 2504.10.50 In powder or in flakes: Other Free Four-year review +25% 2504.90.00 Natural graphite: Other Free Four-year review +25%
2505: Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26 Line Description General Section 301 (China) 2505.10.10 Sand containing by weight 95 percent or more of silica and not more than 0.6 percent of oxide … Free List 3 +25% 2505.10.50 Silica sands and quartz sands: Other Free List 3 +25% 2505.90.00 Natural sands of all kinds, whether or not colored, other than metalbearing sand…: Other Free List 3 +25%
2506: Quartz (other than natural sands); quartzite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of … Line Description General Section 301 (China) 2506.10.00 Quartz (other than natural sands); quartzite, whether or not roughly trimmed or …: Quartz Free List 3 +25% 2506.20.00 Quartz (other than natural sands); quartzite, whether or not roughly trimmed or …: Quartzite Free List 3 +25%
2507: Kaolin and other kaolinic clays, whether or not calcined Line Description General Section 301 (China) 2507.00.00 Kaolin and other kaolinic clays, whether or not calcined Free List 3 +25%
2508: Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte … Line Description General Section 301 (China) 2508.10.00 Other clays (not including expanded clays of heading 6806), andalusite, kyanite …: Bentonite Free List 3 +25% 2508.30.00 Other clays (not including expanded clays of heading 6806), andalusite, kyanite …: Fire-clay Free none 2508.40.01 Other clays (not including expanded clays of heading 6806), andalusite, kyanite …: Other clays Free List 3 +25% 2508.50.00 Andalusite, kyanite and sillimanite Free List 3 +25% 2508.60.00 Other clays (not including expanded clays of heading 6806), andalusite, kyanite …: Mullite Free List 3 +25% 2508.70.00 Other clays (not including expanded clays of heading 6806), andalusite, kyanite …: Chamotte or… Free List 3 +25%
2509: Chalk Line Description General Section 301 (China) 2509.00.10 Chalk: Crude Free List 3 +25% 2509.00.20 Chalk: Other Free List 3 +25%
2510: Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk Line Description General Section 301 (China) 2510.10.00 Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic c…: Unground Free List 3 +25% 2510.20.00 Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic c…: Ground Free List 3 +25%
2511: Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816 Line Description General Section 301 (China) 2511.10.10 Natural barium sulfate (barytes): Ground Free none 2511.10.50 Natural barium sulfate (barytes): Other $1.25/t none 2511.20.00 Natural barium carbonate (witherite) Free List 3 +25%
2512: Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an appar… Line Description General Section 301 (China) 2512.00.00 Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceou… Free List 3 +25%
2513: Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated Line Description General Section 301 (China) 2513.10.00 Pumice; emery; natural corundum, natural garnet and other natural abrasives, whe…: Pumice stone Free List 3 +25% 2513.20.10 Crude or in irregular pieces Free List 3 +25% 2513.20.90 Emery, natural corundum, natural garnet and other natural abrasives: Other Free List 3 +25%
2514: Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape Line Description General Section 301 (China) 2514.00.00 Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or sl… Free List 3 +25%
2515: Marble, travertine and other calcareous monumental or building stone of an apparent specific gravity of 2.5 or more, and alabaster, whether … Line Description General Section 301 (China) 2515.11.00 Marble and travertine: Crude or roughly trimmed Free List 3 +25% 2515.12.10 Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (inclu…: Marble Free List 3 +25% 2515.12.20 Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (inclu…: Travertine 3% List 3 +25% 2515.20.00 Marble, travertine and other calcareous monumental or building stone of an appar…: Other calca… 3% List 3 +25%
2516: Granite, porphyry, basalt, sandstone and other monumental or building stone, whether or not roughly trimmed or merely cut, by sawing or othe… Line Description General Section 301 (China) 2516.11.00 Granite: Crude or roughly trimmed Free List 3 +25% 2516.12.00 Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) s… 2.8% List 3 +25% 2516.20.10 Sandstone: Crude or roughly trimmed Free List 3 +25% 2516.20.20 Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) s… 3% List 3 +25% 2516.90.00 Granite, porphyry, basalt, sandstone and other monumental or building stone, whe…: Other monum… 3% List 3 +25%
2517: Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for road metalling, or for railway or other balla… Line Description General Section 301 (China) 2517.10.00 Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for… Free List 3 +25% 2517.20.00 Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials… Free List 3 +25% 2517.30.00 Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete a…: Tarred maca… Free List 3 +25% 2517.41.00 Granules, chippings and powder, of stones of heading 2515 or 2516, whether or no…: Of marble Free List 3 +25% 2517.49.00 Granules, chippings and powder, of stones of heading 2515 or 2516, whether or no…: Other Free List 3 +25%
2518: Dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slab… Line Description General Section 301 (China) 2518.10.00 Dolomite, not calcined or sintered Free List 3 +25% 2518.20.00 Calcined or sintered dolomite 3% List 3 +25%
2519: Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of othe… Line Description General Section 301 (China) 2519.10.00 Natural magnesium carbonate (magnesite) Free none 2519.90.10 Fused magnesia and dead-burned (sintered) magnesia Free none 2519.90.20 Other: Caustic calcined magnesite Free none 2519.90.50 Other: Other Free none
2520: Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of a… Line Description General Section 301 (China) 2520.10.00 Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) w…: Gypsum; anh… Free List 3 +25% 2520.20.00 Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) w…: Plasters Free List 3 +25%
2521: Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement Line Description General Section 301 (China) 2521.00.00 Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of li… Free List 3 +25%
2522: Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825 Line Description General Section 301 (China) 2522.10.00 Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxid…: Quicklime Free List 3 +25% 2522.20.00 Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxid…: Slaked lime Free List 3 +25% 2522.30.00 Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxid…: Hydraulic l… Free List 3 +25%
2523: Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of … Line Description General Section 301 (China) 2523.10.00 Portland cement, aluminous cement, slag cement, supersulfate cement and similar …: Cement clin… Free List 3 +25% 2523.21.00 White cement, whether or not artificially colored Free List 3 +25% 2523.29.00 Portland cement: Other Free List 3 +25% 2523.30.00 Portland cement, aluminous cement, slag cement, supersulfate cement and similar …: Aluminous c… Free List 3 +25% 2523.90.00 Portland cement, aluminous cement, slag cement, supersulfate cement and similar …: Other hydra… Free List 3 +25%
2524: Asbestos Line Description General Section 301 (China) 2524.10.00 Asbestos: Crocidolite (Blue) Free List 3 +25% 2524.90.00 Asbestos: Other Free List 3 +25%
2525: Mica, including splittings; mica waste Line Description General Section 301 (China) 2525.10.00 Crude mica and mica rifted into sheets or splittings Free List 3 +25% 2525.20.00 Mica, including splittings; mica waste: Mica powder Free List 3 +25% 2525.30.00 Mica, including splittings; mica waste: Mica waste Free List 3 +25%
2526: Natural steatite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including squ… Line Description General Section 301 (China) 2526.10.00 Natural steatite, whether or not roughly trimmed or merely cut, by sawing or oth…: Not crushed… Free none 2526.20.00 Natural steatite, whether or not roughly trimmed or merely cut, by sawing or oth…: Crushed or … Free none
2528: Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric ac… Line Description General Section 301 (China) 2528.00.00 Natural borates and concentrates thereof (whether or not calcined), but not including borates … Free List 3 +25%
2529: Feldspar; leucite, nepheline and nepheline syenite; fluorspar Line Description General Section 301 (China) 2529.10.00 Feldspar; leucite, nepheline and nepheline syenite; fluorspar: Feldspar Free List 3 +25% 2529.21.00 Containing by weight 97 percent or less of calcium fluoride Free none 2529.22.00 Containing by weight more than 97 percent of calcium fluoride Free none 2529.30.00 Leucite; nepheline and nepheline syenite Free List 3 +25%
2530: Mineral substances not elsewhere specified or included Line Description General Section 301 (China) 2530.10.00 Vermiculite, perlite and chlorites, unexpanded Free List 3 +25% 2530.20.10 Kieserite, epsom salts (natural magnesium sulfates): Kieserite Free List 3 +25% 2530.20.20 Kieserite, epsom salts (natural magnesium sulfates): Epsom salts Free List 3 +25% 2530.90.10 Natural cryolite; natural chiolite Free List 3 +25% 2530.90.20 Natural micaceous iron oxides 2.9% List 3 +25% 2530.90.80 Other: Other Free none
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