Ammonium sulfate
Mineral or chemical fertilizers, nitrogenous: > Ammonium sulfate; double salts and mixtures of ammonium sulfate and ammonium nitrate: > Ammonium sulfate
Duty Rate (from China)
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 3102.21.00.00
Granular Ammonium Sulfate 21-0-0 Fertilizer
Granular ammonium sulfate fertilizer with 21% nitrogen and 24% sulfur content, used primarily for correcting sulfur deficiencies in crops like corn and wheat. It falls under HTS 3102.21.00.00 as pure ammonium sulfate not put up in retail packages of heading 3105. The prilled form allows for even spreading and slow-release nitrogen supply to plants.
Prilled Ammonium Sulfate Industrial Grade
Prilled ammonium sulfate used in industrial agriculture for alkaline soil correction and as a nitrogen source in turf management. Classified under HTS 3102.21.00.00 as it qualifies as pure ammonium sulfate per heading 3102 notes (a)(iv). Its small prill size ensures uniform application in large-scale farming.
Bulk Ammonium Sulfate for Cotton Crops
Bulk ammonium sulfate specifically formulated for cotton farming to supply nitrogen and sulfur during vegetative growth stages. It meets HTS 3102.21.00.00 criteria as ammonium sulfate without retail packaging or prohibited mixtures. Helps lower soil pH while providing essential nutrients.
Standard Ammonium Sulfate 21% Nitrogen
Standard crystalline ammonium sulfate providing 21% nitrogen for general field crops like soybeans and rice. Falls squarely under HTS 3102.21.00.00 as described in chapter note 2(a)(iv) for pure ammonium sulfate. Widely used for its acidifying effect on alkaline soils.
Water-Soluble Ammonium Sulfate Fertilizer
Highly water-soluble ammonium sulfate for fertigation systems in greenhouse vegetable production. Classified under HTS 3102.21.00.00 meeting purity standards for ammonium sulfate without additives. Enables precise nutrient delivery through drip irrigation.
Agricultural Grade Ammonium Sulfate Pellets
Pelletized agricultural grade ammonium sulfate for easy handling in mechanical spreaders on golf courses and lawns. HTS 3102.21.00.00 applies as pure ammonium sulfate per note 2(a)(iv), not retail packaged. Provides dual nitrogen and sulfur nutrition.