HTS chapter 31: duty rates for all 24 tariff lines Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or vegetable products. 24 lines are duty-free at the general rate; 24 are on a Section 301 China list.
Official USITC HTS, 2026HTSRev20
3101: Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatme… Line Description General Section 301 (China) 3101.00.00 Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertiliz… Free List 3 +25%
3102: Mineral or chemical fertilizers, nitrogenous Line Description General Section 301 (China) 3102.10.00 Urea, whether or not in aqueous solution Free List 3 +25% 3102.21.00 Ammonium sulfate; double salts and mixtures of ammonium sulfate and ammonium nit…: Ammonium su… Free List 3 +25% 3102.29.00 Ammonium sulfate; double salts and mixtures of ammonium sulfate and ammonium nit…: Other Free List 3 +25% 3102.30.00 Ammonium nitrate, whether or not in aqueous solution Free List 3 +25% 3102.40.00 Mixtures of ammonium nitrate with calcium carbonate or other inorganic nonfertilizing substanc… Free List 3 +25% 3102.50.00 Mineral or chemical fertilizers, nitrogenous: Sodium nitrate Free List 3 +25% 3102.60.00 Double salts and mixtures of calcium nitrate and ammonium nitrate Free List 3 +25% 3102.80.00 Mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution Free List 3 +25% 3102.90.01 Mineral or chemical fertilizers, nitrogenous: Other, including mixtures not specified in the f… Free List 3 +25%
3103: Mineral or chemical fertilizers, phosphatic Line Description General Section 301 (China) 3103.11.00 Containing by weight 35 percent or more of diphosphorous pentaoxide (P2O5) Free List 3 +25% 3103.19.00 Superphosphates: Other Free List 3 +25% 3103.90.01 Mineral or chemical fertilizers, phosphatic: Other Free List 3 +25%
3104: Mineral or chemical fertilizers, potassic Line Description General Section 301 (China) 3104.20.00 Mineral or chemical fertilizers, potassic: Potassium chloride Free List 3 +25% 3104.30.00 Mineral or chemical fertilizers, potassic: Potassium sulfate Free List 3 +25% 3104.90.01 Mineral or chemical fertilizers, potassic: Other Free List 3 +25%
3105: Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosphorus and potassium; other fertilizers; g… Line Description General Section 301 (China) 3105.10.00 Products of this chapter in tablets or similar forms or in packages of a gross weight not exce… Free List 3 +25% 3105.20.00 Mineral or chemical fertilizers containing the three fertilizing elements nitrogen, phosphorus… Free List 3 +25% 3105.30.00 Diammonium hydrogenorthophosphate (Diammonium phosphate) Free List 3 +25% 3105.40.00 Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammoniu… Free List 3 +25% 3105.51.00 Containing nitrates and phosphates Free List 3 +25% 3105.59.00 Other mineral or chemical fertilizers containing the two fertilizing elements ni…: Other Free List 3 +25% 3105.60.00 Mineral or chemical fertilizers containing the two fertilizing elements phosphorus and potassi… Free List 3 +25% 3105.90.00 Mineral or chemical fertilizers containing two or three of the fertilizing eleme…: Other Free List 3 +25%
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